岡山大学大学院社会文化科学研究科Acta Medica Okayama1881-1671612026コロナ禍で現地留学中断体験をした日本人学生における心理的変容 ― TEM 図を用いた体験のとらえ直し過程の分析 ―4763ENKoyuriSAKOTomokoTANAKA10.18926/70277No potential conflict of interest relevant to this article was reported.WileyActa Medica Okayama0309-01678852025Claudin-18 expression in gastric type adenocarcinoma and HPV-associated adenocarcinoma of the uterine cervix10031015ENNobukoYasutakeDepartment of Gynecology and Obstetrics, Graduate School of Medical Sciences, Kyushu UniversityYukiYokawaDepartment of Pathology and Oncology, Graduate School of Medicine, Dentistry & Pharmaceutical Science, Okayama UniversityTakehiroTanakaDepartment of Pathology and Oncology, Graduate School of Medicine, Dentistry & Pharmaceutical Science, Okayama UniversityRiriMishimaDepartment of Pathology and Oncology, Graduate School of Medicine, Dentistry & Pharmaceutical Science, Okayama UniversityMisatoKomamizuDepartment of Gynecology and Obstetrics, Graduate School of Medical Sciences Kyushu University Fukuoka JapanRyosukeKugaDepartment of Otorhinolaryngology, Graduate School of Medical Sciences, Kyushu UniversityRinaJiromaruDepartment of Otorhinolaryngology, Graduate School of Medical Sciences, Kyushu UniversityShinichiroKawatokoDepartment of Medicine and Clinical Science, Kyushu University Beppu HospitalKenzoSonodaDepartment of Gynecology, Kyushu University Beppu HospitalHideakiYahataDepartment of Gynecology and Obstetrics, Graduate School of Medical Sciences, Kyushu UniversityKiyokoKatoDepartment of Gynecology and Obstetrics, Graduate School of Medical Sciences, Kyushu UniversityYoshinaoOdaDepartment of Anatomic Pathology, Pathological Sciences, Graduate School of Medical Sciences, Kyushu UniversityHidetakaYamamotoDepartment of Pathology and Oncology, Graduate School of Medicine, Dentistry & Pharmaceutical Science, Okayama UniversityAims: Claudin-18 (CLDN18) is both a marker for the gastric phenotype and a therapeutic target. However, little is known about its immunoexpression in endocervical adenocarcinomas (ECAs), particularly as detected using the clone 43-14A antibody, or about the gene expression of its isoforms in ECAs.<br>
Methods and results: We examined CLDN18, HIK1083, p16 and Rb expression by immunohistochemistry and high-risk human papillomavirus (HR-HPV) mRNA by in situ hybridization (ISH) in 121 ECAs, including 35 HPV-independent adenocarcinomas (gastric type [GAS], n = 24; non-GAS, n = 11) and 86 HPV-associated ECAs. We also analysed mRNA expression of the CLDN18.1 (lung type) and CLDN18.2 (gastric type) isoforms by quantitative polymerase chain reaction (qPCR) in selected cases. CLDN18 positivity was detected in 8/24 (33%) GASs, 0/11 (0%) non-GASs and 2/86 (2%) HPV-associated ECAs, with positivity defined as staining in ≥75% of tumour cells, as in gastric cancer. When a 5% cut-off was used, CLDN18 positivity was detected in 22/24 (92%) GASs, 0/11 (0%) non-GASs and 6/86 (7%) HPV-associated ECAs; CLDN18 expression was thus significantly associated with GAS histology (P < 0.0001). Among the 6 cases of HPV-associated ECAs with CLDN18 expression (ranging from 5% to 80%), the histological patterns included a mix of usual and mucinous features in 4 cases, pure usual type in 1 and villoglandular variant in 1. Otherwise features such as p16 overexpression and the Rb partial loss pattern were consistent with those of HPV-associated ECAs. Six of 22 (27%) CLDN18-positive GASs were also positive for p16, but their other features―such as CLDN18 expression and the Rb preserved pattern―were the same as in p16 negative GASs. Expression of CLDN18.2 mRNA but not CLDN18.1 mRNA was confirmed in both GASs and HPV-associated ECAs.<br>
Conclusions: CLDN18 (43-14A) emerged as a potential diagnostic and therapeutic marker for GAS. A minor subset of HPV-associated ECAs also can be immunoreactive for CLDN18 and express CLDN18.2 mRNA, suggesting divergent gastric phenotypic differentiation. The caution is that GAS and HPV-associated ECAs can share overlapping histological features and similar expression of CLDN18 and p16.No potential conflict of interest relevant to this article was reported.Springer Science and Business Media LLCActa Medica Okayama2168-81841772025The Challenge of Diagnosing Scirrhous Gastric Cancer by Endoscopic Biopsy: A Case Reporte87334ENYukaIkedaDepartment of Internal Medicine, Clinic IkedaDepartment of Internal Medicine, Clinic IkedaMasayaIwamuroDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesTadashiYoshinoDepartment of Pathology, Okayama UniversityTakehiroTanakaDepartment of Pathology, Okayama University HospitalNobumasaIkedaDepartment of Internal Medicine, Clinic IkedaMotoyukiOtsukaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesScirrhous gastric cancer, also known as linitis plastica, is a rare and aggressive subtype of gastric carcinoma that poses significant diagnostic challenges due to its submucosal infiltration and often normal-appearing mucosa. We report a case involving a 30-year-old Japanese woman who presented with a six-month history of epigastric pain and postprandial vomiting. Initial endoscopic examination revealed erythema and mucosal swelling, with limited antral distensibility and resistance during duodenal intubation. Despite 12 mucosal biopsies, histopathological examination revealed no evidence of malignancy. Given the strong clinical and endoscopic suspicion of scirrhous gastric cancer, additional deep sections and immunohistochemical staining were performed. These revealed scattered signet-ring cell carcinoma and poorly differentiated adenocarcinoma, with positive immunostaining for p53 and Ki67. The patient underwent total gastrectomy, and the diagnosis of scirrhous gastric cancer was confirmed on the resected specimen. This case highlights the importance of a high index of clinical suspicion, close collaboration between endoscopists and pathologists, and the utility of ancillary diagnostic tools, such as immunohistochemistry, in identifying subepithelial gastric malignancies that may be missed on conventional biopsy.No potential conflict of interest relevant to this article was reported.岡山大学大学院教育学研究科Acta Medica Okayama1883-24231912026腎機能の理解を促すための教材開発と中学校理科における授業実践111117ENMotonoriANDOFaculty of Education, Okayama UniversityRisaIKEDASeishin Junior High School/Seishin Girls’ High SchoolFukutoTANAKASeishin Junior High School/Seishin Girls’ High School10.18926/bgeou/70200 本研究では腎臓におけるろ過後，ろ液の成分がどのような物質で構成されているのか，その後の腎臓での再吸収過程を含めて，中学生の腎機能の理解を促す教材開発を試みた。まず，市販の果汁を含む飲料水をメンブレンフィルターでろ過し，ろ液が透明になるのは不溶性物質が除去されるためであること，また，ろ液の甘さから水溶性の糖分はろ過されることを確認した。開発した腎臓糸球体モデルは，腎小体に見立てた蓋に孔を開けたプラスチック容器，赤血球や血液中に存在する様々な物質を模した色や大きさの異なるビーズ，から構成される。生徒は，この教材を用いた授業実践を経て，血球以外の水溶性成分は要不要に関わらず一旦腎小体でろ過されてしまうこと，生体に必要なブドウ糖は尿細管において能動的に再吸収されることを理解し，腎臓のろ過と再吸収に関する新しい考え方と関連する概念を獲得することができた，と考えられた。本研究で開発した教材を用いることにより，生徒の腎臓の役割についての理解を深化させること，同時に自身の健康への関心を高めさせること，について有効であることが分かった。No potential conflict of interest relevant to this article was reported.Japan Stroke SocietyActa Medica Okayama0912-07264762025頭蓋頚椎移行部動静脈瘻の開頭手術時における上腕動脈穿刺による脳血管撮影の有用性410412ENYuichiHirataDepartment of Neurological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesMasafumiHiramatsuDepartment of Neurological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesSusumuSasadaDepartment of Neurological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesJuntaroFujitaDepartment of Neurological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesYutaSotomeDepartment of Neurological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesMasatoKawakamiDepartment of Neurological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesRyuKimuraDepartment of Neurological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesYukiEbisudaniDepartment of Neurological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesKyoheiKinDepartment of Neurological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesJunHarumaDepartment of Neurological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesKenjiSugiuDepartment of Neurological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesShotaTanakaDepartment of Neurological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences頭蓋頚椎移行部動静脈瘻の手術では，異常血管の確認のため術中血管撮影が重要であるが，体位変換時のsheathの固定や撮影血管へのカテーテルの誘導が困難である．今回，頭蓋頚椎移行部動静脈瘻の開頭手術において上腕動脈穿刺によりultra-long sheathを鎖骨下動脈に留置して椎骨動脈撮影（vertebral artery angiography: VAG）を行う方法の有用性を報告する．当院で本血管撮影を施行した症例の患者背景や合併症を評価した．企図した4例，5血管でVAGを施行でき，合併症も認めなかった．体位変換も腹臥位における穿刺部の観察も簡便であり，カテーテルの操作性にも優れ，VAGを容易に施行することができた．また，管球を頭側から移動する際の術野との干渉も最小限に抑えられた．本方法は利点が多く，有用な血管撮影方法であり，頭蓋頚椎移行部動静脈瘻の手術における一助となり得ると考える．No potential conflict of interest relevant to this article was reported.Japanese Society of Internal MedicineActa Medica Okayama0918-291864142025Myeloid Sarcoma in the Small Intestine21552159ENMasayaIwamuroDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesTomohiroKamioDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesShoichiroHirataDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesKatsunoriMatsuedaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesDaisukeKametakaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesTakehiroTanakaDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesSeijiKawanoDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesMotoyukiOtsukaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesMyeloid sarcoma is a rare extramedullary tumor of immature myeloid cells that is often associated with acute myeloid leukemia (AML). We herein report an 81-year-old man who presented with intestinal obstruction due to myeloid sarcoma of the small intestine. Diagnostic challenges were overcome using double-balloon enteroscopy and a biopsy, which confirmed the diagnosis of myeloid sarcoma. The patient subsequently developed AML but responded well to chemotherapy. This case underscores the importance of considering myeloid sarcoma in the differential diagnosis of small-bowel tumors. Highlighting the significance of a histological analysis, even in patients presenting with small bowel obstruction, the early diagnosis and treatment are crucial for improving outcomes, particularly in patients without a history of hematologic malignancies.No potential conflict of interest relevant to this article was reported.Springer Science and Business Media LLCActa Medica Okayama2168-81841752025Pseudoachalasia Due to Malignant Pleural Mesothelioma Involving the Esophaguse84161ENManamiHondaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesMasayaIwamuroDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesKazuyaMiyamotoDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesTakehiroTanakaDepartment of Pathology, Okayama University HospitalMotoyukiOtsukaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesWe report a rare case of pseudoachalasia secondary to malignant pleural mesothelioma involving the esophagus. A 66-year-old man presented with progressive dysphagia, weight loss, and postprandial hiccups. Endoscopic examination showed esophageal dilation with luminal narrowing at the esophagogastric junction, but no mucosal abnormalities. Computed tomography revealed an irregular-shaped mass extending from the peri-esophagogastric junction to the retroperitoneum, accompanied by pleural effusion, right-sided hydronephrosis, and multiple hepatic lesions. Endoscopic ultrasound-guided fine-needle aspiration from the mass lesion through the esophageal lumen revealed epithelioid malignant mesothelioma. This case highlights the importance of considering malignant mesothelioma in the differential diagnosis of pseudoachalasia, particularly when imaging reveals extrinsic esophageal compression without mucosal lesions.No potential conflict of interest relevant to this article was reported.Springer Science and Business Media LLCActa Medica Okayama2168-81841742025Gastrointestinal Stromal Tumors in the Stomach With Tumor Growth and Hemorrhage During Conservative Management: A Report of Two Casese82046ENMasayaIwamuroDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesSatoruKikuchiDepartment of Gastroenterological Surgery, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesShinjiKurodaDepartment of Gastroenterological Surgery, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesTakehiroTanakaDepartment of Gastroenterological Surgery, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesMotoyukiOtsukaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesGastrointestinal stromal tumors (GISTs) are often detected incidentally during esophagogastroduodenoscopy. Although surgical resection is the standard treatment for GISTs, patients with significant comorbidities may not be eligible for surgery and are managed conservatively. Herein, we report two cases of gastric GISTs that were initially observed during the management of other comorbidities but subsequently became enlarged, resulting in gastrointestinal bleeding. These cases highlight the potential risks of tumor progression and bleeding in patients undergoing conservative management.No potential conflict of interest relevant to this article was reported.Springer Science and Business Media LLCActa Medica Okayama1865-72571822025Microsatellite-high intrahepatic cholangiocarcinoma with favorable treatment outcome using pembrolizumab363368ENShigeruHoriguchiDepartment of Gastroenterology and Hepatology, Okayama University HospitalHironariKatoDepartment of Gastroenterology and Hepatology, Okayama University HospitalKazuyaMiyamotoDepartment of Gastroenterology and Hepatology, Okayama University HospitalKosakuMorimotoDepartment of Gastroenterology and Hepatology, Okayama University HospitalAkihiroMatsumiDepartment of Gastroenterology and Hepatology, Okayama University HospitalHiroyukiTerasawaDepartment of Gastroenterology and Hepatology, Okayama University HospitalYukiFujiiDepartment of Gastroenterology and Hepatology, Okayama University HospitalKazuyukiMatsumotoDepartment of Gastroenterology and Hepatology, Okayama University HospitalTakehiroTanakaDepartment of Pathology, Okayama University HospitalMotoyukiOtsukaDepartment of Gastroenterology and Hepatology, Okayama University HospitalIntrahepatic cholangiocarcinoma has a poor prognosis. In unresectable cases, the survival period is short despite combination therapy with cytotoxic anticancer agents and immune checkpoint inhibitors. The usefulness of immune checkpoint inhibitors against malignant tumors with microsatellite instability-high (MSI-H) mutations was shown in the KEYNOTE158 study; however, data for intrahepatic cholangiocarcinoma are insufficient. In the present case, a 65-year-old man with intrahepatic cholangiocarcinoma and lymph node metastasis could not be treated with a combination of gemcitabine, CDDP, and S-1. A comprehensive cancer genomic profiling (CGP) test showed MLH1 pathogenic mutation and MSI-H. When pembrolizumab was administered, the tumor shrinkage effect was rapidly observed, which was sustained even after 30 months. No pathogenic mutations were observed in the germline test, and MSI-high was considered to be due to the MLH1 pathogenic mutation occurring sporadically in somatic cells. MSI-H intrahepatic cholangiocarcinoma is extremely rare. However, because pembrolizumab is expected to be effective, CGP testing should be actively performed.No potential conflict of interest relevant to this article was reported.Springer Science and Business Media LLCActa Medica Okayama2168-81841722025Gastric Metastasis of Renal Cell Carcinoma Initially Diagnosed by Esophagogastroduodenoscopye79651ENMasayaIwamuroDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesTomohiroKamioDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesShoichiroHirataDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesTakehiroTanakaDepartment of Pathology, Okayama University HospitalMotoyukiOtsukaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesHere, we report a rare case of renal cell carcinoma (RCC) initially detected as a gastric metastasis. A 58-year-old man with epigastric discomfort underwent esophagogastroduodenoscopy, which revealed a reddish semi-pedunculated lesion with a whitish coating. Biopsy and imaging confirmed clear cell RCC metastasis. Contrast-enhanced computed tomography (CT) revealed a primary renal tumor with pancreatic and lymph node metastases. Despite chemotherapy treatment, the patient died after 10 months. Gastric metastases from RCC, although rare, should be considered in highly vascular gastric lesions with white coatings. Clinicians must be vigilant for metastatic diseases with atypical gastric findings.No potential conflict of interest relevant to this article was reported.岡山大学教育推進機構Acta Medica Okayama1881-595232026心理臨床家同士のグループ体験における反省的実践1230ENRyosukeKOBASHIInstitute for Promotion of Education and Campus Life, Okayama UniversityMasashiTANAKATokai UniversityRinMURASEGraduate School of Education and Human Development, Nagoya University10.18926/70109 心理臨床家にとって反省的実践は重要であり，多様な形態のグループに参加をすることによって反省的実践を行っている。本研究では，全般的な心理臨床家同士のグループにおける体験（研究1）および継続的なグループにおける体験（研究2）を探索することを目的として，数名の心理臨床家による話し合いをKJ法を援用して分析した。その結果，心理臨床家同士のグループ体験における反省的実践には，【グループ体験が内省につながるかどうか】などの4つ側面が重要であることが示された。また，継続的なグループにおける体験では，《本来の人としての感覚や欲求》や《自分を不自由にしている要因》などの【会における気づき】が得られることが反省的実践として有意義であることが明らかになった。No potential conflict of interest relevant to this article was reported.岡山大学文明動態学研究所Acta Medica Okayama2436-832652026Depicting Buddha : Practice, Prescription and Perception134152ENShijunZHANGDepartment of Sociology & Institute of Sociology and Anthropology, Peking University特集：Sacred Objects in Religions (Special Issue: Sacred Objects in Religions)10.18926/70059Tibetan thangka refers to a genre of pictorial art widely produced across the Tibetan cultural region since the 11th century. Although scroll painting is its most common form, thangkas are also created through embroidery, appliqué, and brocade weaving. The subjects depicted encompass a wide range of themes within Tibetan Buddhism and the Bön religion, including various Buddhas, bodhisattvas, deities, monks, mandalas, as well as astronomical and medical knowledge. Within Tibetan religious beliefs, thangkas are not merely visual representations; they are venerated as supports of Buddha (Tib. sku rten), understood as physical embodiments of divine presence. At the same time, the creation and veneration of thangka constitute a rich aesthetic tradition in which artists repeatedly integrate realist elements into this sacred canvas. <br>
This paper offers a micro anthropological examination (Tanaka 2005; 田中 2006) of the depiction of thangka as a practice oscillating between inscribing the canonical and drawing the real. Through critically engaging with the theory of agency of art (Gell 1998), and the analysis of writing and drawing (Ingold 2017), this study examines the dialectical relationship between rendering sacred images and depicting worldly reality, and how such practices unfold in the tension between prescriptive authority and embodied perception.No potential conflict of interest relevant to this article was reported.Springer Science and Business Media LLCActa Medica Okayama2168-81841812026Central Serous Chorioretinopathy in Parallel With Onset and Relapses of Minimal Change Nephrotic Syndrome: A 28-Year Case Follow-Upe102426ENToshihikoMatsuoDepartment of Ophthalmology, Graduate School of Interdisciplinary Science and Engineering in Health Systems, Okayama UniversityTakehiroTanakaDepartment of Pathology, Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama UniversityJunWadaDepartment of Nephrology, Rheumatology, Endocrinology, and Metabolism, Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama UniversityCentral serous chorioretinopathy is an idiopathic disease that manifests as one or several localized, small, dome-shaped serous retinal detachments on fundus examination. The pathophysiology involves fluid leakage from the choroidal capillaries, known as the choriocapillaris, into the subretinal space through sites of damage in the retinal pigment epithelium. This case report discusses the underlying causes of central serous chorioretinopathy-like findings in minimal change nephrotic syndrome.<br>
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The patient was a 33-year-old woman who developed nephrotic syndrome that was confirmed to be minimal change disease by renal biopsy. She experienced two major relapses of nephrotic syndrome at the ages of 36 and 41 years. She also had a minor relapse at the age of 37 years, five months after the first major relapse at the age of 36 years, as well as four additional minor relapses at the ages of 44, 46, 50, and 51 years. The onset of central serous chorioretinopathy-like manifestations, which were localized to the left eye, occurred three months after the initial onset of nephrotic syndrome at the age of 33 years. Two subsequent episodes of relapse of central serous chorioretinopathy-like manifestations were observed in both eyes at intervals of five months and one month, respectively, after major relapses of nephrotic syndrome at the ages of 36 and 41 years. Thereafter, she did not develop further central serous chorioretinopathy-like manifestations.<br>
<br>
She discontinued oral prednisolone at the age of 54 years and experienced no further relapses of nephrotic syndrome through her latest visit at the age of 61 years. She maintained normal renal function and good visual acuity in both eyes. The long-term, consistent temporal association between episodes of central serous chorioretinopathy and the onset and relapses of minimal change nephrotic syndrome is strongly supported by longitudinal clinical observations spanning 28 years. This parallel course suggests a possible shared pathophysiological mechanism or common triggering factors underlying both diseases.No potential conflict of interest relevant to this article was reported.Elsevier BVActa Medica Okayama2772-5723522026Feasibility and Diagnostic Utility of Mucosal T-Cell Flow Cytometry for Intestinal Graft-Versus-Host Disease100820ENMasayaIwamuroDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesTakumiKondoDepartment of Hematology and Oncology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesDaisukeEnnishiDepartment of Hematology and Oncology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesNobuharuFujiiDepartment of Hematology and Oncology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesMaiHiramatsuDivision of Medical Support, Okayama University HospitalArakiHirabataDivision of Medical Support, Okayama University HospitalTakahideTakahashiDivision of Medical Support, Okayama University HospitalTakehiroTanakaDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesYoshinobuMaedaDepartment of Hematology and Oncology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesMotoyukiOtsukaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesBackground and Aims: Timely diagnosis of intestinal complications after hematopoietic stem cell transplantation (HSCT), including graft-versus-host disease (GVHD), transplant-associated thrombotic microangiopathy, and cytomegalovirus infection, is essential for appropriate management. This study evaluated whether mucosal T-cell profiling from endoscopic biopsies could support the diagnosis of these post-transplant conditions.<br>
Methods: We prospectively analyzed 58 intestinal biopsy specimens from 21 post-HSCT patients. Paired samples were obtained from the stomach and duodenum during upper endoscopy and from the ileum and large intestine during colonoscopy. Lymphocytes were isolated from each specimen and analyzed using flow cytometry. These data were integrated with those of a previously collected cohort (35 patients, 51 samples) for comparative immunophenotypic analysis across histologically defined groups.<br>
Results: Duodenal biopsies yielded more lymphocytes than did gastric biopsies (mean ± standard deviation: 532 ± 823 vs 233 ± 392 cells; P = .070), with comparable yields between the ileum and colon. Among 41 evaluable cases, the CD56+:CD3+ ratio was significantly lower in patients with GVHD (5.5 ± 2.2%) than in those with nonspecific or no inflammation (28.4 ± 16.3%; P = .006). A cutoff value of <11% provided 85.7% sensitivity and 83.3% specificity for diagnosing GVHD (area under the curve = 0.91).<br>
Conclusion: Mucosal T-cell profiling using endoscopic biopsies is feasible and may aid in the diagnosis of GVHD after HSCT. A decreased CD56+:CD3+ ratio is a promising marker for distinguishing GVHD from other post-transplant intestinal conditions.No potential conflict of interest relevant to this article was reported.Springer Science and Business Media LLCActa Medica Okayama1433-73982025A rare case of supratentorial ependymosarcoma harboring ZFTA::RELA fusionENYujiMatsumotoDepartment of Neurological Surgery, Dentistry, and Pharmaceutical Sciences, Okayama University Graduate School of MedicineYasukiSurugaDepartment of Neurological Surgery, Dentistry, and Pharmaceutical Sciences, Okayama University Graduate School of MedicineKaishiSatomiDepartment of Pathology, Faculty of Medicine, Kyorin UniversityYoheiInoueDepartment of Neurological Surgery, Dentistry, and Pharmaceutical Sciences, Okayama University Graduate School of MedicineYasuhikoHattoriDepartment of Neurological Surgery, Dentistry, and Pharmaceutical Sciences, Okayama University Graduate School of MedicineJojiIshidaDepartment of Neurological Surgery, Dentistry, and Pharmaceutical Sciences, Okayama University Graduate School of MedicineKazuhikoKurozumiDepartment of Neurosurgery, Hamamatsu University HospitalSumihitoNobusawaDepartment of Human Pathology, Gunma University School of MedicineJunkoHiratoDepartment of Pathology, Public Tomioka General HospitalTakehiroTanakaDepartment of Pathology, Okayama University HospitalHiroyukiYanaiDepartment of Pathology, Dentistry and Pharmaceutical Sciences, Okayama University Graduate School of MedicineKanaWashioDepartment of Pediatrics, Okayama University HospitalKoichiIchimuraDepartment of Pathology, Faculty of Medicine, Kyorin UniversityTomotsuguIchikawaDepartment of Neurosurgery, Kagawa Prefectural Central HospitalYoshihiroOtaniDepartment of Neurological Surgery, Dentistry, and Pharmaceutical Sciences, Okayama University Graduate School of MedicineShotaTanakaDepartment of Neurological Surgery, Dentistry, and Pharmaceutical Sciences, Okayama University Graduate School of MedicineEpendymosarcoma is an exceedingly rare variant of ependymoma characterized by a mixture of ependymomatous and sarcomatous components. We report a case of supratentorial ependymosarcoma harboring a ZFTA::RELA fusion in a 10-year-old girl. Histologically, the tumor comprised an ependymomatous component resembling clear cell ependymoma and a sarcomatous component. ZFTA::RELA fusion was confirmed in both components. Genome-wide methylation profiling classified both components as supratentorial ependymoma, ZFTA fusion–positive by the German Cancer Research Center (DKFZ) CNS tumor classifier v12b8. However, their copy number alteration profiles were distinct. The ependymomatous component exhibited a gain of chromosome 1q and a loss of chromosomes 1p, 9, and 19q, while the sarcomatous component showed a loss of chromosome 14. These findings suggest that both components may have differentiated from a common precursor despite their distinct morphologies. The patient underwent gross total resection followed by adjuvant chemoradiotherapy and remains recurrence-free eight years post-treatment. Further investigation of additional cases is warranted to better understand the pathogenesis of this rare tumor.No potential conflict of interest relevant to this article was reported.Acta Medica Okayama2025Avoidant/restrictive food intake disorder prognosis and its relation with autism spectrum disorder in Japanese childrenENChieTANAKAGraduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama UniversityNo potential conflict of interest relevant to this article was reported.Springer Science and Business Media LLCActa Medica Okayama2168-818417102025Primary Lacrimal Sac Diffuse Large B-cell Lymphoma Treated With Local Radiotherapy Alone: A Case With No Relapse After 21 Years of Follow-Upe95411ENToshihikoMatsuoHealthcare Science, Graduate School of Interdisciplinary Science and Engineering in Health Systems, Okayama UniversityTakehiroTanakaPathology, Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama UniversityMitsuhiroTakemotoRadiotherapy, Himeji Red Cross HospitalPrimary lacrimal sac lymphoma is rare and diagnosed as diffuse large B-cell lymphoma in a predominant histopathological type. Systemic chemotherapy would be the standard of care, but local radiotherapy may be a treatment option toward a localized lesion. The present patient is a 54-year-old otherwise healthy woman with a right lacrimal sac mass, which was proven by excisional biopsy to be diffuse large B-cell lymphoma. Since she did not have any other systemic lesions on gallium scintigraphy and neck-to-abdominal computed tomography scans, which were the standard procedure at that time, she underwent local radiotherapy at 40 Gy. Two years later, at the age of 56 years, she developed radiation retinopathy with macular edema in the right eye and had spotty laser photocoagulation in the nasal half of the fundus. At the age of 57 years, she developed radiation cataract and underwent cataract surgery with intraocular lens implantation in the right eye. At the age of 58 years, the macular edema in the right eye became worse and remained active, resulting in poor visual acuity of 0.1. She thus underwent 25-gauge vitrectomy in the right eye to peel off the adhering posterior vitreous surface, together with the internal limiting membrane, as the standard procedure at that time. The visual acuity in the right eye was elevated to 0.6. She maintained the visual acuity afterward and had no relapse of lymphoma in 21 years from the diagnosis of primary right lacrimal sac diffuse large B-cell lymphoma. Local radiotherapy would still be a treatment option for localized lymphoma lesions such as primary lacrimal sac lymphoma.No potential conflict of interest relevant to this article was reported.Elsevier BVActa Medica Okayama0016-70374002025Lithium- and oxygen-isotope compositions of a Si-rich nebular reservoir determined from chondrule constituents in the Sahara 97103 EH3 chondrite5171ENToriiDouglas-SongThe Pheasant Memorial Laboratory Institute for Planetary Materials, Okayama UniversityTsutomuOtaThe Pheasant Memorial Laboratory Institute for Planetary Materials, Okayama UniversityMasahiroYamanakaThe Pheasant Memorial Laboratory Institute for Planetary Materials, Okayama UniversityHiroshiKitagawaThe Pheasant Memorial Laboratory Institute for Planetary Materials, Okayama UniversityRyojiTanakaThe Pheasant Memorial Laboratory Institute for Planetary Materials, Okayama UniversityChristianPotiszilThe Pheasant Memorial Laboratory Institute for Planetary Materials, Okayama UniversityTakKunihiroThe Pheasant Memorial Laboratory Institute for Planetary Materials, Okayama UniversityHere we report the in situ ion-microprobe analyses of the Li- and O-isotope compositions of enstatite, FeO-rich pyroxene, olivine, glass, and cristobalite grains from six chondrule-related objects from the Sahara 97103 EH3 chondrite. The O-isotope composition of the enstatite grains scattered around the intersection between the terrestrial fractionation and primitive chondrule minerals lines. Whereas, that of olivine varied along the primitive chondrule minerals line. Based on the mineralogy, we found cristobalite formed as a result of Si saturation, instead of the reduction of FeO-rich silicates, consistent with Si-enrichment of whole rock enstatite chondrites. Based on the mineralogy and O-isotope compositions, we infer that olivines in some chondrules are relict grains. In chondrules that contained olivine, no abundant niningerite [(Mg,Fe,Mn)S] was observed. Thus, enstatite formation can be explained by the interaction of an olivine precursor with additional SiO2 (Mg2SiO4 + SiO2 → Mg2Si2O6), instead of sulfidation (Mg2SiO4 + S → 1/2 Mg2Si2O6 + MgS + 1/2 O2). Using the equation Mg2SiO4 + SiO2 → Mg2Si2O6 and the O-isotope compositions of enstatite and olivine, the O-isotope composition of the additional SiO2 was estimated. Based on the O-isotope composition, we infer that there could be a Si-rich gas with an elevated Δ17O value similar to, or greater than the second trend line (Δ17O = 0.9 ‰) suggested by Weisberg et al. (2021), during chondrule formation. The variation in the Li-isotope compositions of enstatite and olivine grains from EH3 chondrules is smaller than that for the same phases from CV3 chondrules. The variation in the Li-isotope compositions of the enstatite and olivine grains from EH3 chondrules is also smaller than that of their O-isotope compositions. During the recycling of enstatite-chondrite chondrules, both Li- and O-isotope compositions were homogenized. Although enstatite is the major carrier of Li in EH3 chondrules, the Li-isotope composition (δ7Li) of enstatite is lower than that of whole rock EH3 chondrites, suggesting the existence of a phase with higher δ7Li. Meanwhile, the Li-isotope composition and concentration (δ7Li, [Li]) of enstatite is higher than that of olivine. The Li-isotope composition of the Si-rich gas was estimated to be δ7Li = 1 ‰, using a similar mass-balance calculation as applied for the O-isotope composition. The Li-isotope composition of the Si-rich gas from the enstatite-chondrite-chondrule forming-region, is consistent with that of whole rock EH3 chondrites, and differs significantly from that of the Si-rich gas from the carbonaceous-chondrite-chondrule forming-region (δ7Li = −11 ‰) determined by a previous study. We speculate that the Si-rich gas in the carbonaceous-chondrite-chondrule forming-region maintained the Li-isotope heterogeneity inherited from light lithium synthesized by galactic cosmic-ray spallation in the interstellar medium.No potential conflict of interest relevant to this article was reported.Springer Science and Business Media LLCActa Medica Okayama2168-81841782025Craniofacial Fibrous Dysplasia to Affect or Not the Optic Nerve in Long-Term Follow-Up of Three Casese91072ENToshihikoMatsuoDepartment of Ophthalmology, Graduate School of Interdisciplinary Science and Engineering in Health Systems, Okayama University, Okayama University HospitalTakehiroTanakaDepartment of Pathology, Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama UniversityKiyoshiYamadaDepartment of Plastic and Reconstructive Surgery, Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama UniversityMitsuhiroOkanoDepartment of Otorhinolaryngology, School of Medicine, International University of Health and WelfareFibrous dysplasia of the bone is characterized by immature fibrous bones of trabeculae and fibrovascular proliferation in the medulla. In this study, we report three consecutive patients with craniofacial fibrous dysplasia with or without optic nerve involvement. In Case 1, a 43-year-old man with blurred vision in the right eye at the first visit was well until the age of 54 years, when he came back with symptoms suggestive of paranasal sinusitis. Computed tomography scans disclosed a mucocele in the right sphenoid sinus and thickened bilateral ethmoid, sphenoid, and frontal bones. He underwent an emergency nasal endoscopic surgery to make a drainage opening to the sphenoid and ethmoid sinuses on the right side with incomplete success. The pathology of the resected tissue confirmed fibrous dysplasia. With intravenous antibiotics, he recovered from blepharoptosis, complete ophthalmoplegia, and visual acuity decrease on the right side. He was well until the age of 71 years when he had a self-limiting episode of visual field cloudiness caused by the right sphenoid sinus mucocele. At the age of 75 years, he developed abrupt vision loss to no light perception in the right eye. He underwent an open skull surgery to extirpate the sphenoid mucocele on the right side and died of an unknown cause two years later. In Case 2, a 29-year-old man had a two-week-long headache, and computed tomography scans revealed fibrous dysplasia in the bilateral sphenoid bones. Nasal biopsy at the spheno-ethmoid recess proved a pathological diagnosis of fibrous dysplasia. Goldmann perimetry showed normal visual fields in both eyes. He was followed every year by magnetic resonance imaging to maintain normal visual fields until the latest visit at the age of 41 years. In Case 3, a 12-year-old girl was referred to an ophthalmologist to check her vision. She had been diagnosed with fibrous dysplasia of the left maxillary bone at the age of six years by a dentist. She had a gingival resection on the left maxilla at the age of 15 years and had a left maxillary bone resection at 18 years at another hospital. One month after the resection, Goldmann perimetry showed superior peripheral field depression in the left eye, in contrast with the normal visual field in the right eye. She maintained the visual acuity of 1.5 in both eyes until the last visit at the age of 21 years. In fibrous dysplasia as a rare disease, functional and cosmetic problems, including vision problems, should be considered in a case-based approach.No potential conflict of interest relevant to this article was reported.Japanese Society of Internal MedicineActa Medica Okayama0918-291863122024Gastric Mucosa-associated Lymphoid Tissue Lymphoma That Relapsed after 11 Years Subsequent to Achieving Complete Remission16971702ENShokoInooDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesMasayaIwamuroDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesTakehiroTanakaDepartment of Pathology, Okayama University HospitalYoshiroKawaharaDepartment of Practical Gastrointestinal Endoscopy, Okayama University HospitalMotoyukiOotukaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesA 38-year-old Japanese man was diagnosed with extranodal marginal zone lymphoma of the mucosa-associated lymphoid tissue in the stomach (gastric MALT lymphoma). Fluorescence in situ hybridization analysis revealed the absence of t (11;18) (q21;q21) translocation but the presence of extra copies of MALT1, indicating tetrasomy 18. Helicobacter pylori eradication led to complete remission (CR). However, the gastric MALT lymphoma relapsed after 11 years old. This case underscores the need for long-term observation (>10 years) of patients with gastric MALT lymphoma. Further investigation is warranted to elucidate the correlation between trisomy/tetrasomy 18 and the recurrence propensity.No potential conflict of interest relevant to this article was reported.Japanese Society of Internal MedicineActa Medica Okayama0918-291863102025Idiopathic Gastric Antral Ulcers13671371ENMasayaIwamuroDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesTakehiroTanakaDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesSeijiKawanoDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesYoshiroKawaharaDepartment of Practical Gastrointestinal Endoscopy, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesMotoyukiOtsukaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesA Japanese woman presented with gastric antral ulcers accompanied by erosion and edema, demonstrating a chronic pattern of improvement and recurrence for more than six years. The patient had no relevant treatment history, and Helicobacter pylori infection was ruled out. Other potential etiologies contributing to gastric ulcers were eliminated on the basis of endoscopic biopsy and blood laboratory findings. Consequently, the patient was diagnosed with idiopathic gastric antral ulcer. This disease is often overlooked, and the chronological endoscopic images provided in this report can be used as a reference.No potential conflict of interest relevant to this article was reported.Springer Science and Business Media LLCActa Medica Okayama2662-4435612025Biogeochemical impact of nickel and urea in the great oxidation event654ENDilan M.RatnayakeThe Pheasant Memorial Laboratory for Geochemistry and Cosmochemistry, Institute for Planetary Materials, Okayama UniversityRyojiTanakaThe Pheasant Memorial Laboratory for Geochemistry and Cosmochemistry, Institute for Planetary Materials, Okayama UniversityEizoNakamuraThe Pheasant Memorial Laboratory for Geochemistry and Cosmochemistry, Institute for Planetary Materials, Okayama UniversityThe Great Oxidation Event marks the first substantial increase in atmospheric oxygen on Earth. Despite the oxygenic photosynthesis that emerged hundreds of million years before this event, the specific biogeochemical mechanisms responsible for maintaining low oxygen levels for an extended period remain elusive. Here, we show the critical role of urea as a nitrogen source for cyanobacteria, the cascading impact of nickel on abiotic urea production, and their combined effects on the proliferation of cyanobacteria leading to the great oxidation event. Urea formation was experimentally evaluated under simulated Archean conditions and cyanobacterial growth was monitored providing urea as the nitrogen source. Our findings demonstrate that urea can be produced in the Archean cyanobacterial habitats with UV-C irradiation, shedding light on the controversy regarding the evolution of nitrogen-fixing enzymes in primitive cyanobacteria. We propose that environmental conditions in the early Archean, characterized by elevated urea and nickel concentration, may have hindered cyanobacterial expansion, contributing to the delay between the evolution of oxygenic photosynthesis and the onset of the great oxidation event.No potential conflict of interest relevant to this article was reported.Springer Science and Business Media LLCActa Medica Okayama2168-81841772025Six-Year Remission With No Relapse After Four-Time Weekly Rituximab Only for Bilateral Ocular Adnexal Follicular Lymphomae88945ENToshihikoMatsuoOphthalmology, Graduate School of Interdisciplinary Science and Engineering in Health Systems, Okayama University, and Okayama University HospitalTakehiroTanakaDepartment of Pathology, Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama UniversityNobuharuFujiiDivision of Transfusion and Cell Therapy, Department of Hematology and Oncology, Okayama University HospitalFollicular lymphoma mostly takes an indolent course, and thus, observation with watchful waiting is a main therapeutic strategy. Recent long-term studies suggest earlier treatment with rituximab monotherapy may benefit patients by delaying the need for treatment in the later phase of exacerbation. In this study, we reported a patient with bilateral orbital follicular lymphoma who received four-time weekly rituximab monotherapy as an induction therapy only and maintained the remission for 5 years with no treatment. The patient was a 51-year-old woman who developed a right upper orbital mass and was diagnosed with follicular lymphoma grade 1 by the excisional biopsy. Two years later, at the age of 53 years, she developed a left lacrimal gland mass and underwent excision. The pathological diagnosis was follicular lymphoma grade 1. She did not have any other systemic lesions by fluorodeoxyglucose positron emission tomography. At the age of 54 years, she developed a new mass on the nasal side of the right orbit and underwent weekly rituximab monotherapy (375 mg/m2) four times a month, leading to the reduction of the mass in 3 months. Two high uptake sites on the temporal and nasal side of the right superior orbit by fluorodeoxyglucose positron emission tomography disappeared one year later at the age of 55 years. She was followed with no treatment for 6 years until the age of 60 years at the latest visit. In case of a local orbital relapse, local radiotherapy would be the standard, but rituximab monotherapy as an induction therapy only was chosen in the present patient. Rituximab monotherapy in place of local radiotherapy would be a treatment option for orbital follicular lymphoma.No potential conflict of interest relevant to this article was reported.Elsevier BVActa Medica Okayama0012-821X6532025Meteoritic and asteroidal amino acid heterogeneity: Implications for planetesimal alteration conditions and sample return missions119205ENChristianPotiszilPheasant Memorial Laboratory, Institute for Planetary Materials, Okayama UniversityTsutomuOtaPheasant Memorial Laboratory, Institute for Planetary Materials, Okayama UniversityMasahiroYamanakaPheasant Memorial Laboratory, Institute for Planetary Materials, Okayama UniversityKatsuraKobayashiPheasant Memorial Laboratory, Institute for Planetary Materials, Okayama UniversityRyojiTanakaPheasant Memorial Laboratory, Institute for Planetary Materials, Okayama UniversityEizoNakamuraPheasant Memorial Laboratory, Institute for Planetary Materials, Okayama UniversityCarbonaceous chondrites (CC) and asteroid return samples contain amino acids (AA), which are essential for an origin of life on the early Earth and can provide important information concerning planetesimal alteration processes. While many studies have investigated AA from CC, separate studies have often found differing abundances for the same meteorite. Accordingly, analytical bias, differing terrestrial contamination levels and intrinsic sample heterogeneity have been proposed as potential reasons. However, current analytical techniques allow for the analysis of several mg-sized samples and can thus enable an investigation of AA heterogeneity within single meteorite specimens. Here, such an analytical technique is applied to characterise the AA in triplicate aliquots of three CCs. The results indicate that CCs are heterogenous in terms of their AA at the mm-scale. Furthermore, the results help to further constrain the effects of planetesimal alteration on organic matter and the requirements of future sample return missions that aim to obtain organic-bearing extraterrestrial materials.No potential conflict of interest relevant to this article was reported.American Astronomical SocietyActa Medica Okayama0004-637X96512024Unraveling the Cr Isotopes of Ryugu: An Accurate Aqueous Alteration Age and the Least Thermally Processed Solar System Material52ENRyojiTanakaThe Pheasant Memorial Laboratory for Geochemistry and Cosmochemistry, Institute for Planetary Materials, Okayama UniversityDilan M.RatnayakeThe Pheasant Memorial Laboratory for Geochemistry and Cosmochemistry, Institute for Planetary Materials, Okayama UniversityTsutomuOtaThe Pheasant Memorial Laboratory for Geochemistry and Cosmochemistry, Institute for Planetary Materials, Okayama UniversityNoahMiklusicakThe Pheasant Memorial Laboratory for Geochemistry and Cosmochemistry, Institute for Planetary Materials, Okayama UniversityTakKunihiroThe Pheasant Memorial Laboratory for Geochemistry and Cosmochemistry, Institute for Planetary Materials, Okayama UniversityChristianPotiszilThe Pheasant Memorial Laboratory for Geochemistry and Cosmochemistry, Institute for Planetary Materials, Okayama UniversityChieSakaguchiThe Pheasant Memorial Laboratory for Geochemistry and Cosmochemistry, Institute for Planetary Materials, Okayama UniversityKatsuraKobayashiThe Pheasant Memorial Laboratory for Geochemistry and Cosmochemistry, Institute for Planetary Materials, Okayama UniversityHiroshiKitagawaThe Pheasant Memorial Laboratory for Geochemistry and Cosmochemistry, Institute for Planetary Materials, Okayama UniversityMasahiroYamanakaThe Pheasant Memorial Laboratory for Geochemistry and Cosmochemistry, Institute for Planetary Materials, Okayama UniversityMasanaoAbeInstitute of Space and Astronautical Science, Japan Aerospace Exploration AgencyAkikoMiyazakiInstitute of Space and Astronautical Science, Japan Aerospace Exploration AgencyAikoNakatoInstitute of Space and Astronautical Science, Japan Aerospace Exploration AgencySatoruNakazawaInstitute of Space and Astronautical Science, Japan Aerospace Exploration AgencyMasahiroNishimuraInstitute of Space and Astronautical Science, Japan Aerospace Exploration AgencyTatsuakiOkadaInstitute of Space and Astronautical Science, Japan Aerospace Exploration AgencyTakanaoSaikiInstitute of Space and Astronautical Science, Japan Aerospace Exploration AgencySatoshiTanakaInstitute of Space and Astronautical Science, Japan Aerospace Exploration AgencyFuyutoTeruiInstitute of Space and Astronautical Science, Japan Aerospace Exploration AgencyYuichiTsudaInstitute of Space and Astronautical Science, Japan Aerospace Exploration AgencyTomohiroUsuiInstitute of Space and Astronautical Science, Japan Aerospace Exploration AgencySei-ichiroWatanabeDepartment of Earth and Planetary Sciences, Nagoya UniversityToruYadaInstitute of Space and Astronautical Science, Japan Aerospace Exploration AgencyKasumiYogataInstitute of Space and Astronautical Science, Japan Aerospace Exploration AgencyMakotoYoshikawaInstitute of Space and Astronautical Science, Japan Aerospace Exploration AgencyEizoNakamuraThe Pheasant Memorial Laboratory for Geochemistry and Cosmochemistry, Institute for Planetary Materials, Okayama UniversityThe analysis of samples returned from the C-type asteroid Ryugu has drastically advanced our knowledge of the evolution of early solar system materials. However, no consensus has been obtained on the chronological data, which is important for understanding the evolution of the asteroid Ryugu. Here, the aqueous alteration age of Ryugu particles was determined by the Mn–Cr method using bulk samples, yielding an age of 4.13 + 0.62/−0.55 Myr after the formation of Ca–Al-rich inclusions (CAI). The age corresponds to 4563.17 + 0.60/−0.67 Myr ago. The higher 55Mn/52Cr, ε54Cr, and initial ε53Cr values of the Ryugu samples relative to any carbonaceous chondrite samples implies that its progenitor body formed from the least thermally processed precursors in the outermost region of the protoplanetary disk. Despite accreting at different distances from the Sun, the hydrous asteroids (Ryugu and the parent bodies of CI, CM, CR, and ungrouped C2 meteorites) underwent aqueous alteration during a period of limited duration (3.8 ± 1.8 Myr after CAI). These ages are identical to the crystallization age of the carbonaceous achondirtes NWA 6704/6693 within the error. The ε54Cr and initial ε53Cr values of Ryugu and NWA 6704/6693 are also identical, while they show distinct Δ'17O values. This suggests that the precursors that formed the progenitor bodies of Ryugu and NWA 6703/6693 were formed in close proximity and experienced a similar degree of thermal processing in the protosolar nebula. However, the progenitor body of Ryugu was formed by a higher ice/dust ratio, than NWA6703/6693, in the outer region of the protoplanetary disk.No potential conflict of interest relevant to this article was reported.Springer Science and Business Media LLCActa Medica Okayama2168-81841762025Managing Persistent Pupillary Membranes With Surgery or Medication: A Report of Three Casese86695ENToshihikoMatsuoDivision of Healthcare Science, Graduate School of Interdisciplinary Science and Engineering in Health Systems, Okayama UniversityTakehiroTanakaDepartment of Pathology, Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama UniversityThe persistent pupillary membrane, as a congenital anomaly, is a remnant of a network of feeding blood vessels for the lens of the eye, called tunica vasculosa lentis. This study reports three patients with persistent pupillary membrane in both eyes who presented in different situations and were managed differently to achieve better vision. The first child (Case 1) who had been seen initially at the age of two years complained of severe photophobia even though he had good visual acuity, and hence, he and his family chose surgical resection of the pupillary membrane in both eyes at the age of six years just before the admission to an elementary school. He did not develop any surgical complications, such as cataract and glaucoma, and maintained the visual acuity in decimals of 1.2 in both eyes at the age of 17 years.<br>
The second child (Case 2), who was seen first at the age of one month, had persistent pupillary membranes in both eyes, together with Peters' anomaly in the left eye. The iris process adhesion to the corneal inner surface was visualized later by optical coherence tomography. She wore full-correction glasses and obtained the visual acuity of 0.7 in the right eye, so she had no problem studying at an elementary school. She used topical 1% atropine once a week in both eyes to maintain pupillary dilation and also used 0.5% timolol and 1% brinzolamide as pressure-lowering eye drops in the left eye with Peters' anomaly.<br>
The third patient (Case 3) with persistent pupillary membranes in both eyes complained of vision problems for the first time at the age of 49 years when she developed cataract. Surgical resection of the pupillary membrane was done in the initial phase of cataract surgery with intraocular lens implantation in both eyes. At surgical resection of the pupillary membrane, a safe and efficient way was to cut the root of the pupillary membrane on the iris surface with scissors, and then the isolated tissues of the pupillary membrane were pulled out with forceps from the side port at the corneal limbus. Pathological examinations of the excised tissues showed blood vessels with red blood cells in the lumen. In such a rare congenital disease as the persistent pupillary membrane, a case-based approach to choose a better option in different conditions from individual to individual is still required to have a better vision in learning at school and in daily working life.No potential conflict of interest relevant to this article was reported.Springer Science and Business Media LLCActa Medica Okayama2168-81841762025Whole-Eye Radiation for the Local Control of Choroidal Lymphoma in Primary Central Nervous System Lymphoma: A 14-Year Case Studye85680ENToshihikoMatsuoGraduate School of Interdisciplinary Science and Engineering in Health Systems, Okayama UniversityTomofumiYanoDepartment of Internal Medicine, Okayama Rosai HospitalKotaroYoshioDepartment of Radiology, Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama UniversityTakehiroTanakaDepartment of Pathology, Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama UniversityHirotakeNishimuraDepartment of Pathology, Kawasaki Medical SchoolKen-ichiMatsuokaDepartment of Hematology and Oncology, Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama UniversityInvolved-site radiation therapy is effective for curative and palliative treatments of cancers, including lymphoma. This case study describes the use of whole-eye radiation for primary intraocular lymphoma occurring during primary central nervous system lymphoma. The patient, a 68-year-old man, developed personality changes and apathy two weeks after cataract surgery combined with vitrectomy for vitreous opacity in the left eye. Magnetic resonance imaging revealed a mass lesion in the left frontal lobe, and biopsy by craniotomy confirmed diffuse large B-cell lymphoma. He underwent chemotherapy using rituximab combined with high-dose methotrexate and high-dose cytarabine in association with intrathecal methotrexate and cytarabine injections, leading to complete remission. At age 75, he noticed forgetfulness, and fluorodeoxyglucose positron emission tomography and magnetic resonance imaging revealed a relapse of lymphoma in the splenium of the corpus callosum. He underwent chemotherapy using rituximab combined with high-dose methotrexate, followed by monthly rituximab monotherapy for one year and then rituximab monotherapy every two months for one year. He maintained complete remission with no treatment until age 78, when he developed subretinal choroidal lesions in the left eye and underwent whole-eye radiation at 40 Gy. One year later, he developed subretinal choroidal lesions in the right eye and underwent whole-eye radiation at 40 Gy. At age 81, he had lower limb weakness with disorientation. Magnetic resonance imaging showed a relapse of lymphoma in the right frontal to temporal lobe. The brain lesions showed a marked response to four weeks of oral tirabrutinib as a salvage therapy, but the lesions regrew, and the patient died seven months later. Throughout the treatment, he maintained a visual acuity of 0.7 (decimal scale) in both eyes. In conclusion, whole-eye radiation should be considered as a treatment option for the local control of active intraocular lymphoma, especially choroidal lesions, for patients with primary central nervous system lymphoma with no active brain lesions and without systemic treatment.No potential conflict of interest relevant to this article was reported.Elmer Press, Inc.Acta Medica Okayama1923-41551652025Nephronophthisis and Retinitis Pigmentosa (Senior-Loken Syndrome) After Living-Donor Kidney Transplantation: Twelve-Year Follow-Up in a Young Woman164173ENToshihikoMatsuoGraduate School of Interdisciplinary Science and Engineering in Health Systems, Okayama UniversityYasuhiroOnishiDepartment of Nephrology, Rheumatology, Endocrinology and Metabolism, Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama UniversityHiroshiMorinagaDepartment of Nephrology, Rheumatology, Endocrinology and Metabolism, Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama UniversityJunWadaDepartment of Nephrology, Rheumatology, Endocrinology and Metabolism, Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama UniversityTakehiroTanakaDepartment of Pathology, Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama UniversityMotooArakiDepartment of Urology, Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama UniversitySenior-Loken syndrome is a hereditary ciliopathy with recessive trait that manifests as nephronophthisis and retinitis pigmentosa. This report described an 18-year-old woman who was referred to a University Hospital to set up a treatment plan for chronic renal failure of an unknown cause. She had experienced nocturnal polyurea from the age of 12 years and was found to have an elevated level of serum creatinine at 3 mg/dL at the age of 15 years. She underwent renal biopsy at a hometown regional hospital which showed global glomerulosclerosis in six of the 13 glomeruli examined, renal tubular dilation in irregular shape, and marked interstitial fibrosis with lymphocytic infiltration. At the age of 19 years, she received a living-donor kidney transplant from her 46-year-old father as a preemptive therapy. At surgery, biopsy of the father’s donor kidney showed two glomeruli with global sclerosis out of 24 glomeruli examined, in association with minimal interstitial fibrosis and lymphocytic infiltration. She began to have extended-release tacrolimus 4 mg daily and mycophenolate mofetil 1,000 mg daily. According to the standard protocol, she underwent biopsy of the transplanted donor kidney to reveal interstitial fibrosis and lymphocytic infiltration, in addition to no sign of rejection and no glomerular deposition of immunoglobulins and complements, both 4 weeks and 14 months after the kidney transplantation. At the age of 23 years, 4 years after the kidney transplantation, she was, for the first time, diagnosed retinitis pigmentosa, and hence, Senior-Loken syndrome. She was followed up in the stable condition with basal doses of tacrolimus 5 mg daily, mycophenolate mofetil 1,000 mg daily, and prednisolone 5 mg daily up until now in 12 years after the kidney transplantation. The interstitial fibrosis with lymphocytic infiltration in the donor kidney might be a milder presentation of the disease with recessive inheritance.No potential conflict of interest relevant to this article was reported.Springer Science and Business Media LLCActa Medica Okayama2168-81841752025Detailed Ophthalmic and Pathological Features of Choroidal Metastasis From Breast Cancer: A Case Series of Five Patientse83484ENToshihikoMatsuoDivision of Healthcare Science, Graduate School of Interdisciplinary Science and Engineering in Health Systems, Okayama UniversityTakehiroTanakaDepartment of Pathology, Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama UniversityTadahikoShienDepartment of Breast and Endocrine Surgery, Okayama University HospitalAtsushiMuraokaDepartment of Surgery, Kagawa Rosai HospitalHiroyoshiDoiharaDepartment of Breast and Endocrine Surgery, Okayama University HospitalBreast cancer causes choroidal metastases on rare occasions. This study presented the eye manifestations of choroidal metastases from breast cancer and their response to treatments in detail as well as their pathological correlation in five patients. The patients' age at the diagnosis of breast cancer ranged from 24 to 69 years (median: 37 years). The time from the diagnosis of breast cancer to the detection of metastases was concurrent in one patient, two years later in three patients, and six years later in the other patient. The time from the detection of systemic metastases to the detection of choroidal metastases was the same in one patient, while it ranged from one to seven years later in four patients. Choroidal metastases were in the unilateral eye of four patients, whereas they were in both eyes of one patient. Choroidal metastases manifested as one or a few nodular or flat choroidal lesions with serous retinal detachment. As for the treatment of choroidal metastases, enucleation of the right eye was chosen based on the patient's wish as well as the family's wish in the earliest patient when cancer notification was not the norm in Japan. In the other four patients, whole-eye radiation was performed to reduce the choroidal metastatic lesions. As regards the prognosis, which was available in four patients, three patients died within one year from the diagnosis of choroidal metastases, while one patient died one year and eight months later. Regarding the pathology of breast cancer, which was available in four patients, immunostaining of the preserved enucleated eye in the earliest patient revealed that breast cancer cells in the choroidal metastatic lesion were positive for estrogen receptor and negative for progesterone receptor and human epidermal growth factor receptor 2 (HER2). Invasive ductal carcinoma in two patients was positive for estrogen receptor and negative for HER2, while invasive ductal carcinoma in the other patient was triple-negative for estrogen receptor, progesterone receptor, and HER2 with a high Ki-67 index. In conclusion, the prognosis for life was poor in patients with breast cancer who developed choroidal metastases. Choroidal metastatic lesions showed a response to whole-eye radiation to improve the quality of vision at the end of life. Vision-related symptoms should be monitored in the course of chemotherapy for systemic metastases. No potential conflict of interest relevant to this article was reported.Japanese Society of Internal MedicineActa Medica Okayama0918-29186432025Characteristics of Early Gastric Cancer in a Patient with a History of Helicobacter pylori Infection and No History of Eradication Therapy343350ENSakikoKuraokaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesSeijiKawanoDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesShokoInoDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesTakuyaSatomiDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesKentaHamadaDepartment of Practical Gastrointestinal Endoscopy, Okayama University HospitalYoshiyasuKonoDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesMasayaIwamuroDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesYoshiroKawaharaDepartment of Practical Gastrointestinal Endoscopy, Okayama University HospitalTakehiroTanakaDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesHiroyukiOkadaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesMotoyukiOtsukaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesObjective The characteristics of gastric cancer in patients with atrophic mucosa and no apparent history of Helicobacter pylori eradication have not been thoroughly investigated. Therefore, this study examined the clinicopathological characteristics of gastric cancer in these patients.<br>
Methods We retrospectively examined the endoscopic and pathological characteristics of gastric cancer in patients who underwent endoscopic submucosal dissection.<br>
Patients We divided the patients into 2 groups: those with gastric atrophy and no history of eradication (group A; n=102) and those with a history of eradication (group B; n=161). In group A, patients were further divided into mild atrophy (group C) and severe atrophy (group D) groups, while group B was further divided into those who underwent eradication treatment >5 years ago (group E) and those who underwent eradication 1-5 years ago (group F).<br>
Results Group A comprised significantly older individuals (75±8.0 vs. 71±7.5 years old, p<0.001) with a higher frequency of elevated gastric cancer than group B (32.4% vs. 17.4%, p=0.006). Compared with group E, group A was older and had a greater incidence of elevated gastric cancer. The incidence of gastric cancer in the U or M region was lower in group C than in group D.<br>
Conclusion Gastric cancer in patients with gastric atrophy and no history of eradication was associated with an older age and higher frequency of elevated-type morphology than in those with a history of eradication.No potential conflict of interest relevant to this article was reported.WileyActa Medica Okayama2397-9070942025Frequency and Characteristics of Gastrointestinal Diseases in Patients With Neurofibromatosise70151ENManamiHondaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesMasayaIwamuroDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesTakehiroTanakaDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesYasushiYamasakiDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesSeijiKawanoDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesSakikoHiraokaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesYoshiroKawaharaDepartment of Practical Gastrointestinal Endoscopy,Okayama University HospitalMotoyukiOtsukaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesBackground and Aim: Patients with neurofibromatosis (NF) frequently experience gastrointestinal symptoms, but the specific characteristics of these lesions are not well understood.<br>
Methods: To investigate the prevalence and nature of gastrointestinal diseases in this population, we analyzed the gastrointestinal lesions identified through endoscopic examinations in patients with NF.<br>
Results: We included 225 patients with NF type 1 (NF1) and 15 with NF type 2 (NF2). None of the NF2 patients underwent endoscopy. Among the NF1 patients, 27 received endoscopies, and 13 (59%) had gastrointestinal lesions. These 13 patients were predominantly male (10 males and three females), with a median age of 53 years (range: 19-76 years). The identified lesions included colorectal polyps (n = 6), gastrointestinal stromal tumors ([GIST], n = 4), subepithelial lesions (n = 3), gastric fundic gland polyps (n = 3), diffuse intestinal ganglioneuromatosis (n = 2), esophageal polyps (n = 2), a Schwann cell hamartoma (n = 1), esophageal cancer (n = 1), and a gastric hyperplastic polyp (n = 1). All GISTs and one case of diffuse intestinal ganglioneuromatosis were surgically resected. Interestingly, six out of 13 patients were asymptomatic. Additionally, all patients who required surgery were 40 years of age or older.<br>
Conclusions: These findings suggest that routine endoscopic examinations, along with imaging techniques like computed tomography and magnetic resonance imaging, could be beneficial for the early detection of gastrointestinal lesions in NF1 patients aged 40 and above.No potential conflict of interest relevant to this article was reported.Springer Science and Business Media LLCActa Medica Okayama2168-81841742025Bilateral Scleritis and Neutrophilic Dermatosis With Cytogenetic Chromosomal Aberrancy Related to Pyoderma Gangrenosum: A Case Report of a 20-Year Follow-Upe82348ENToshihikoMatsuoDepartment of Ophthalmology, Graduate School of Interdisciplinary Science and Engineering in Health Systems, Okayama UniversityTakehiroTanakaDepartment of Pathology, Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama UniversityNoboruAsadaDepartment of Hematology and Oncology, Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama UniversityMikakoObikaDepartment of General Internal Medicine, Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama UniversityRyotaroOmichiDepartment of Otolaryngology, Head and Neck Surgery, Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama UniversityKeijiIwatsukiDepartment of Dermatology, Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama UniversityPyoderma gangrenosum is a non-infectious autoimmune disease with skin plaques and ulcers in the entity of neutrophilic dermatosis and may have a background of myelodysplastic syndromes. This study reported a 20-year follow-up of a patient with pyoderma gangrenosum and scleritis who showed chromosomal aberrancy from the initial phase and later in the course developed thrombocythemia. A 51-year-old man presented with widespread indurated erythematous plaques with scaling and pustules on the forehead, bilateral eyelids, and nasal bridge, in addition to nodular scleritis in the left eye and ulcer formation of the plaques in the lower legs. Skin biopsy revealed massive dermal infiltration mainly with neutrophils in the absence of neutrophilic vasculitis. Suspected of myelodysplastic syndromes, bone marrow biopsy was normal, while chromosomal aberrancy, 46, XY, del (20) (q11q13.3), was detected. In the diagnosis of neutrophilic dermatosis, probably of pyoderma gangrenosum, he began to have oral prednisolone 20 mg daily and colchicine 1 mg daily, leading to the subsidence of skin lesions. Four months later, he developed nodular scleritis in the right eye and began to use topical 0.1% betamethasone in both eyes. He was stable with only prednisolone 12.5 mg daily until the age of 55.5 years, when he showed an increase of serum lactate dehydrogenase. The bone marrow aspirate disclosed neither blast cell increase nor atypical cells. The same chromosomal aberrancy was repeatedly detected. One year later, he developed breathing difficulty and underwent tracheostomy. Laryngeal lesion biopsy disclosed squamous cell papilloma with human papillomavirus-6. At 60 years old, he showed marginal corneal infiltration in the left eye, and at 61 years old, hypopyon in the right eye. Platelets tended to increase up to 1000 × 103/µL, and bone marrow examinations were recommended but refused by the patient. At the latest follow-up at 71 years old, he was ambulatory in health and stable with a tracheostomy cannula. In conclusion, pyoderma gangrenosum with scleritis occurred in an undetermined hematological malignancy with chromosomal aberrancy.No potential conflict of interest relevant to this article was reported.Springer Science and Business Media LLCActa Medica Okayama2168-81841732025A Natural Course From Primary Intraocular Lymphoma to Brain Lymphoma in Four Years According to Patient's Choicee81476ENToshihikoMatsuoDepartment of Ophthalmology, Graduate School of Interdisciplinary Science and Engineering in Health Systems, Okayama UniversityTakehiroTanakaDepartment of Pathology, Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama UniversityJojiIshidaDepartment of Neurological Surgery, Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama UniversityShotaroKondoDepartment of Internal Medicine, Kurashiki Municipal HospitalKen-ichiMatsuokaDepartment of Hematology and Oncology, Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama UniversityPrimary intraocular lymphoma or vitreoretinal lymphoma is a rare entity of diffuse large B-cell lymphoma that presents vitreous opacity and retinal and choroidal infiltration. Primary central nervous system lymphoma would occur previously, later, or concurrently with respect to primary intraocular lymphoma. This study reported a 72-year-old patient with a pathological diagnosis of primary intraocular lymphoma who developed central nervous system lymphoma four years later in the course of no treatment. She presented with a four-year history of blurred vision in both eyes after cataract surgeries. Three weeks previously, she underwent a vitrectomy in the left eye at a clinic, and measurements of the vitreous fluid showed a high level of interleukin-10 at 5739 pg/mL, in contrast with interleukin-6 at 142 pg/mL. Cytology of the vitreous fluid was class III on the Papanicolaou classification. Head magnetic resonance imaging detected nothing abnormal. She underwent vitrectomy in the right eye as a diagnostic procedure to show large cells in the vitreous which were positive for CD20 and Ki-67 and negative for CD3, leading to a pathological diagnosis of large B-cell lymphoma. Prophylactic chemotherapy with high-dose methotrexate was recommended as a therapeutic option, but she chose observation since she did not have any eye or systemic symptoms. In the follow-up every three months by an oncologist and an ophthalmologist, she did not have any symptoms, and serum levels of soluble interleukin-2 receptor were in the normal range at each visit. She was well for four years until the age of 76 years when she fell and hit her head, and an emergency head computed tomography scan showed a mass in the left occipital lobe. Magnetic resonance imaging demonstrated a well-defined circular mass in the left occipital lobe with a hyperintense signal in the T2-weighted fluid-attenuated inversion recovery (FLAIR) image and diffusion-weighted image. Fluorodeoxyglucose positron emission tomography showed no abnormal uptake systemically, except for the left occipital lesion. She underwent a brain biopsy by craniotomy to pathologically prove diffuse large B-cell lymphoma. She was recommended to receive first-line chemotherapy as the standard treatment but chose observation with no treatment and died of brain lymphoma nine months later. This case happened to illustrate a natural course of primary intraocular lymphoma which proceeded to central nervous system lymphoma four years later.No potential conflict of interest relevant to this article was reported.岡山大学教師教育開発センターActa Medica Okayama2186-1323152025主体的・自律的な学びを萌芽させる「授業と授業をつなぐ家庭学習」の探究297311ENJunkoTANAKAOkayama Municipal Hosen Junior High SchoolRyoMISAWAFaculty of Education, Okayama University10.18926/CTED/68500 生徒が自ら学習を進めていく力を身に付けるには，授業内だけでなく，家庭など授業外の場での学習経験を積む必要がある。つまり，学習は授業内だけで完結するのではなく，広範な活動を通して成立する。本研究では，公立中学校の第2学年を対象に授業と家庭学習を連携させる実践を行い，生徒の「主体的・自律的な学び」を萌芽させることを目指した。教師が学習方略や目標設定の重要性を伝え，メタ認知を促すことで，生徒は自己調整学習のサイクルを意識し，自分なりの学習方略を探求するようになった。また，家庭学習で授業につながる課題に取り組むことで，授業への主体的な参加と，授業外で自律的に学ぶ意欲が促されることも示唆された。No potential conflict of interest relevant to this article was reported.Nature PortfolioActa Medica Okayama2045-23221512025Changes of leucine-rich alpha 2 glycoprotein could be a marker of changes of endoscopic and histologic activity of ulcerative colitis5248ENYukiAoyamaDepartment of Gastroenterology and Hepatology, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama UniversitySakikoHiraokaDepartment of Gastroenterology and Hepatology, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama UniversityErikoYasutomiDepartment of Gastroenterology and Hepatology, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama UniversityToshihiroInokuchiDepartment of Gastroenterology and Hepatology, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama UniversityTakehiroTanakaDepartment of Pathology, Dentistry and Pharmaceutical Sciences, Okayama University Graduate School of MedicineKensukeTakeiDepartment of Gastroenterology and Hepatology, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama UniversityShokoIgawaDepartment of Gastroenterology and Hepatology, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama UniversityKeikoTakeuchiDepartment of Gastroenterology and Hepatology, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama UniversityMasahiroTakaharaDepartment of Gastroenterology and Hepatology, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama UniversityJunkiToyosawaDepartment of Gastroenterology and Hepatology, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama UniversityYasushiYamasakiDepartment of Gastroenterology and Hepatology, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama UniversityHideakiKinugasaDepartment of Gastroenterology and Hepatology, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama UniversityJunKatoDepartment of Gastroenterology, Graduate School of Medicine, Chiba UniversityHiroyukiOkadaDepartment of Gastroenterology, Japanese Red Cross Society Himeji HospitalMotoyukiOtsukaDepartment of Gastroenterology and Hepatology, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama UniversityLeucine-rich alpha 2 glycoprotein (LRG) is one of the serum biomarkers for disease activity of ulcerative colitis (UC). We focused on the correlation between the changes of LRG and the changes of endoscopic and histologic activity of UC, in comparison to the changes of fecal calprotectin (Fcal), fecal immunochemical test (FIT), and C-reactive protein (CRP). Seventy-nine patients with two or more colonoscopies were enrolled, and 123 paired colonoscopies and 121 paired biopsies were examined. With regard to the change of endoscopic/histologic activity between the preceding and subsequent colonoscopy, there was improvement (n = 29/45), unchanging (n = 63/36), and worsening (n = 31/40). The correlations between the changes of marker levels and endoscopic/histologic activity were Fcal; r = 0.50/0.39 and FIT; r = 0.41/0.40, LRG; r = 0.42/0.40 and CRP; r = 0.22/0.17. Furthermore, when the correlation between the changes of LRG levels and the changes of endoscopic/histological activity was compared with those of other markers, the correlation of LRG tended to be superior to those of CRP (CRP vs. LRG; p = 0.08/0.01). LRG is equivalent to fecal markers and superior to CRP, when inferring changes in disease activity of UC based on changes in its level.No potential conflict of interest relevant to this article was reported.Springer Science and Business Media LLCActa Medica Okayama2168-81841722025Presumed Autoimmune Keratitis in Both Eyes Without Systemic Manifestations: A 40-Year Course of a Patient With Corneal Infiltrates and Melte79852ENToshihikoMatsuoDepartment of Ophthalmology, Graduate School of Interdisciplinary Science and Engineering in Health Systems, Okayama UniversityTakehiroTanakaDepartment of Pathology, Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama UniversityPeripheral corneal infiltration, corneal ulcer, and melt are recognized complications linked to systemic immunological diseases, such as antineutrophil cytoplasmic antibody (ANCA)-associated vasculitis. These manifestations, which occur in isolation, might be autoimmune keratitis but are difficult to prove underlying immunological abnormalities. This report described a patient with presumed autoimmune keratitis who repeatedly presented corneal infiltration and perforation in both eyes even after penetrating keratoplasty. The 68-year-old patient with a stable condition of keratoconjunctivitis sicca, in a 28-year follow-up, abruptly developed mild infiltrates in the corneal center of the right eye and white dense infiltrates in the peripheral and central cornea of the left eye. He was treated with topical 0.1% betamethasone eye drops and oral prednisolone tapering from 30 mg daily. The patient underwent cataract surgeries in both eyes 10 months after the onset of corneal infiltration and subsequently underwent penetrating keratoplasty in both eyes due to abrupt corneal perforation in the left eye 14 months after the onset of corneal infiltration. Six months post-keratoplasty, he experienced a recurrence of infiltrates in the corneal grafts in both eyes, leading to corneal leukoma in the left eye. The corneal graft in the right eye maintained its integrity with relatively mild opacity until approximately 3.5 years post-keratoplasty, when he abruptly developed white dense infiltration of both the corneal graft and his own peripheral cornea at the age of 73. In response to oral prednisolone tapered from 15 mg daily, the corneal infiltration in the right eye resolved but resulted in graft failure. Since he did not exhibit systemic symptoms and signs throughout the course, the repeat episodes of infiltration in both his own cornea and the corneal graft would be the manifestations of autoimmune keratitis. The entity of autoimmune keratitis in isolation would be beneficial to establish a therapeutic strategy for long-term immunosuppression in light of a risk for steroid side effects and a high rate of corneal graft failure.No potential conflict of interest relevant to this article was reported.Springer Science and Business Media LLCActa Medica Okayama1865-72571822025A case of pancreatic ductal adenocarcinoma growing within the pancreatic duct mimicking an intraductal tubulopapillary neoplasm376382ENRyosukeSatoDepartment of Gastroenterology and Hepatology, Okayama University HospitalKazuyukiMatsumotoDepartment of Gastroenterology and Hepatology, Okayama University HospitalMayuUkaDepartment of Radiology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesKoseiTakagiDepartment of Gastroenterological Surgery, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesKenjiNishidaDepartment of Pathology, Dentistry and Pharmaceutical Science, Okayama University Graduate School of MedicineTakehiroTanakaDepartment of Pathology, Dentistry and Pharmaceutical Science, Okayama University Graduate School of MedicineYukiFujiiDepartment of Gastroenterology and Hepatology, Okayama University HospitalKoichiroTsutsumiDepartment of Gastroenterology and Hepatology, Okayama University HospitalShigeruHoriguchiDepartment of Gastroenterology and Hepatology, Okayama University HospitalMotoyukiOtsukaDepartment of Gastroenterology and Hepatology, Okayama University HospitalWe herein report a case of pancreatic ductal adenocarcinoma (PDAC) that developed within the pancreatic duct and was initially diagnosed as an intraductal tubulopapillary neoplasm (ITPN). A 76-year-old man presented with weight loss and main pancreatic duct dilation. The imaging studies revealed a 30-mm hypovascular tumor within the main duct of the pancreatic head. An endoscopic examination with a biopsy revealed high-grade atypical epithelial cells with immunostaining patterns suggestive of ITPN. Following robot-assisted pancreaticoduodenectomy, postoperative pathology revealed conflicting features: nodular/cribriform infiltrations typical of ITPN and non-lobular replacement with scattered infiltrations characteristic of PDAC. A comprehensive genomic profiling test detected KRAS and TP53 mutations, leading to the final diagnosis of PDAC (fT3N1aM0, stage IIB). The patient received adjuvant S-1 chemotherapy and remained recurrence-free for 15 months post-surgery. This case highlights the diagnostic challenges of differentiating intraductal pancreatic tumors and demonstrates the utility of integrating genetic testing with conventional diagnostic modalities for an accurate diagnosis and appropriate treatment selection.No potential conflict of interest relevant to this article was reported.岡山大学大学院社会文化科学研究科Acta Medica Okayama1881-1671582024介護士に必要なソーシャルスキル――教育実践に向けた研究課題の展望――119134ENSayumiMIYAKEYoichiYAMANOTomokoTANAKA10.18926/68308No potential conflict of interest relevant to this article was reported.AIP PublishingActa Medica Okayama0021-9606159192023Efficiency and energy balance for substitution of CH4 in clathrate hydrates with CO2 under multiple-phase coexisting conditions194504ENHidekiTanakaResearch Institute for Interdisciplinary Science, Okayama UniversityMasakazuMatsumotoResearch Institute for Interdisciplinary Science, Okayama UniversityTakumaYagasakiDivision of Chemical Engineering, Graduate School of Engineering Science, Osaka UniversityMany experimental and theoretical studies on CH4–CO2 hydrates have been performed aiming at the extraction of CH4 as a relatively clean energy resource and concurrent sequestration of CO2. However, vague or insufficient characterization of the environmental conditions prevents us from a comprehensive understanding of even equilibrium properties of CH4–CO2 hydrates for this substitution. We propose possible reaction schemes for the substitution, paying special attention to the coexisting phases, the aqueous and/or the fluid, where CO2 is supplied from and CH4 is transferred to. We address the two schemes for the substitution operating in three-phase and two-phase coexistence. Advantages and efficiencies of extracting CH4 in the individual scheme are estimated from the chemical potentials of all the components in all the phases involved in the substitution on the basis of a statistical mechanical theory developed recently. It is found that although substitution is feasible in the three-phase coexistence, its working window in temperature–pressure space is much narrower compared to the two-phase coexistence condition. Despite that the substitution normally generates only a small amount of heat, a large endothermic substitution is suggested in the medium pressure range, caused by the vaporization of liquid CO2 due to mixing with a small amount of the released CH4. This study provides the first theoretical framework toward the practical use of hydrates replacing CH4 with CO2 and serves as a basis for quantitative planning.No potential conflict of interest relevant to this article was reported.Japanese Society of Internal MedicineActa Medica Okayama0918-291863212024Endoscopic and Histological Gastritis in University Students with Helicobacter pylori Infection28752884ENShotaroOkanoueDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesHiroyukiSakaeDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesKenjiYokotaDepartment of Bacteriology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesTakehiroTanakaDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesYukaObayashiDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesMakotoAbeDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesYoshiyasuKonoDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesHiromitsuKanzakiDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesMasayaIwamuroDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesSeijiKawanoDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesYoshiroKawaharaDepartment of Practical Gastrointestinal Endoscopy, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesHiroyukiYanaiDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesHiroyukiOkadaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesObjective Although the characteristics of Helicobacter pylori infection have been extensively reported, there is a lack of consensus regarding its characteristics in young adults. The present study examined the endoscopic and histological characteristics of young adults who underwent eradication therapy for H. pylori infection.<br>
Methods We examined the H. pylori infection status of first-year students at Okayama University School of Medicine and Dentistry between 2014 and 2020. A total of 152 (6.8%) students who were positive for H. pylori antibody or pepsinogen tests were enrolled in the study. Among them, 107 students underwent endoscopy, and their biopsy samples were investigated. Seventy-five students were diagnosed with H. pylori infections.<br>
Results Of 75 H. pylori-positive patients, 57 (76.0%) had endoscopic atrophic gastritis, and 42 (56.0%) had histological atrophy. A few patients had severe atrophic gastritis. All 65 patients who underwent an eradication assessment were successfully treated. After successful eradication, 26 patients underwent endoscopic follow-up. The mean follow-up period was 32.9 months. A histological evaluation revealed that gastric antrum atrophy had subsided in 11 of 14 patients, and atrophy in the lesser curvature of the gastric body had subsided in 7 of 8 patients.<br>
Conclusion More than half of young adults with H. pylori infection had atrophic gastritis. We found mild atrophy in young adults, which subsided shortly after eradication treatment. This study provides a foundation for future studies to evaluate the validity of eradication therapy in preventing gastric cancer in patients.No potential conflict of interest relevant to this article was reported.ElsevierActa Medica Okayama0006-497114582025Oral Inflammation and Microbiome Dysbiosis Exacerbate Chronic Graft-versus-host Disease881896ENYuiKambaraDepartment of Hematology, Oncology and Respiratory Medicine, Okayama University Medical SchoolHideakiFujiwaraDepartment of Hematology and Oncology, Okayama University HospitalAkiraYamamotoDepartment of Hematology and Oncology, Okayama University HospitalKazuyoshiGotohDepartment of Medical Laboratory Science, Okayama University Graduate School of Health SciencesShumaTsujiDepartment of Microbiology and Genetics, Okayama University Graduate School of Health SciencesMariKunihiroDepartment of Hematology, Oncology and Respiratory Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesTadashiOyamaDepartment of Hematology, Oncology and Respiratory Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesToshikiTeraoDepartment of Hematology, Oncology and Respiratory Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesAyameSatoDivision of Hospital Dentistry, Okayama University HospitalTakehiroTanakaDepartment of Pathology and Oncology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesDanielPeltierDivision of Pediatric Hematology, Oncology, and Stem Cell Transplantation, Department of Pediatrics, Herman B Wells Center for Pediatric Research, Simon Cancer Center, Indiana University School of MedicineKeisukeSeikeDepartment of Hematology and Oncology, Okayama University HospitalHisakazuNishimoriDepartment of Hematology and Oncology, Okayama University HospitalNoboruAsadaDepartment of Hematology and Oncology, Okayama University HospitalDaisukeEnnishiCenter for Comprehensive Genomic Medicine, Okayama University HospitalKeikoFujiiDepartment of Clinical Laboratory, Okayama University HospitalNobuharuFujiiDivision of Blood Transfusion, Okayama University HospitalKen-ichiMatsuokaDepartment of Hematology and Oncology, Okayama University HospitalYoshihikoSogaDivision of Hospital Dentistry, Okayama University HospitalPavanReddyDan L Duncan Comprehensive Cancer Center, Baylor College of MedicineMaedaYoshinobuDepartment of Hematology and Oncology, Okayama University HospitalThe oral microbiota, second in abundance to the gut, is implicated in chronic systemic diseases, but its specific role in graft-versus-host disease (GVHD) pathogenesis has been unclear. Our study finds that mucositis-induced oral dysbiosis in patients after hematopoietic cell transplantation (HCT) associated with increased chronic GVHD (cGVHD), even in patients receiving posttransplant cyclophosphamide. In murine HCT models, oral dysbiosis caused by bilateral molar ligatures exacerbated cGVHD and increased bacterial load in the oral cavity and gut, with Enterococcaceae significantly increasing in both organs. In this model, the migration of Enterococcaceae to cervical lymph nodes both before and after transplantation activated antigen-presenting cells, thereby promoting the expansion of donor-derived inflammatory T cells. Based on these results, we hypothesize that pathogenic bacteria increase in the oral cavity might not only exacerbate local inflammation but also enhance systemic inflammation throughout the HCT course. Additionally, these bacteria translocated to the gut and formed ectopic colonies, further amplifying systemic inflammation. Furthermore, interventions targeting the oral microbiome mitigated murine cGVHD. Collectively, our findings highlight the importance of oral dysbiosis in cGVHD and suggest that modulation of the oral microbiome during transplantation may be an effective approach for preventing or treating cGVHD.No potential conflict of interest relevant to this article was reported.WileyActa Medica Okayama2050-09041312025Eyelid Spindle Cell Lipoma: Case Report and Review of Three Patients in Literaturee70097ENToshihikoMatsuoGraduate School of Interdisciplinary Science and Engineering in Health Systems, Okayama UniversityKiyoshiYamadaPlastic and Reconstructive Surgery, Kousei HospitalYasumasaMonobeDepartment of Pathology, General Medical Center, Kawasaki Medical SchoolTakehiroTanakaDepartment of Pathology, Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama UniversityA 39-year-old woman presented a saucer-shaped mass in the left upper eyelid and underwent the extirpation at local anesthesia. Pathologically, collagen fibers, capillaries, small vessels, and CD34-positive spindle cells were dispersed among mature adipose tissues, indicative of spindle cell lipoma. Long-lasting cyst-like eyelid masses would be usually dermoid cysts, and spindle cell lipoma would be listed as a rare pathological diagnosis in differential diagnoses of cyst-like lesions in the upper and lower eyelid.No potential conflict of interest relevant to this article was reported.Elmer Press, Inc.Acta Medica Okayama1923-41551612025Local Control of Conjunctival Malignant Melanoma by Proton Beam Therapy in a Patient With No Metastasis in Six Years From in Situ to Nodular Lesions2836ENToshihikoMatsuoRegenerative and Reconstructive Medicine (Ophthalmology), Graduate School of Interdisciplinary Science and Engineering in Health Systems, Okayama UniversityTakeshiOgataDepartment of Radiology, Proton Beam Center, Tsuyama Chuo HospitalTakahiroWakiDepartment of Radiology, Proton Beam Center, Tsuyama Chuo HospitalTakehiroTanakaDepartment of Pathology, Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama UniversityKotaTachibanaDepartment of Dermatology, Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama UniversityTomokazuFujiDepartment of Gastroenterological Surgery, Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama UniversityTakuyaAdachiDepartment of Gastroenterology and Hepatology, Okayama University HospitalOsamuYamasakiDepartment of Dermatology, Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama UniversityConjunctival malignant melanoma is extremely rare, with no standard of care established at moment. Here we report a 65-year-old woman, as a hepatitis B virus (HBV) carrier, who presented concurrently a liver mass and lower bulbar conjunctival pigmented lesions in the right eye. Needle liver biopsy and excisional conjunctival biopsy showed hepatocellular carcinoma and conjunctival malignant melanoma in situ, respectively. The priority was given to segmental liver resection for hepatocellular carcinoma after transcatheter arterial chemoembolization. In 1 year, she underwent second and third resection of bulbar conjunctival pigmented lesions, and the pathological examinations constantly showed melanoma in situ. In the course, she showed gradual widening of pigmented lesions to upper bulbar conjunctiva and lower palpebral conjunctiva and lower eyelid. About 2.5 years from the initial visit, the lower eyelid lesion was resected for a genomic DNA-based test of BRAF mutations which turned out to be absent, and then, she began to have intravenous anti-programmed cell death-1 (PD-1), nivolumab every 3 or 4 weeks. She developed iritis in the right eye with conjunctival melanoma as an immune-related adverse event, 3 months after the beginning of nivolumab, and so she used daily topical 0.1% betamethasone eye drops to control the intraocular inflammation. She showed no metastasis in 6 years of follow-up, but later in the course, 5 years from the initial visit, she developed abruptly a non-pigmented nodular lesion on the temporal side of the bulbar conjunctiva along the corneal limbus, accompanied by two pigmented nodular lesions in the upper and lower eyelids in a few months. She thus, underwent proton beam therapy toward the conjunctival melanoma and achieved the successful local control. Proton beam therapy is a treatment option in place of orbital exenteration, and multidisciplinary team collaboration is desirable to achieve better cosmetic and functional outcomes in conjunctival malignant melanoma.No potential conflict of interest relevant to this article was reported.Springer Science and Business Media LLCActa Medica Okayama2192-31831412024Successful immunotherapy with ipilimumab and nivolumab in a patient with pulmonary sclerosing pneumocytoma6063ENYumiInukai-MotokuraDepartment of Allergy and Respiratory Medicine, Okayama University HospitalKiichiroNinomiyaDepartment of Allergy and Respiratory Medicine, Okayama University HospitalTakahiroBabaDepartment of Allergy and Respiratory Medicine, Okayama University HospitalHirokiOmoriDepartment of Allergy and Respiratory Medicine, Okayama University HospitalTetsuyaTakeguchiDepartment of Allergy and Respiratory Medicine, Okayama University HospitalMariUnoDepartment of Allergy and Respiratory Medicine, Okayama University HospitalYoshiyukiAyadaDepartment of Pathology, Okayama University HospitalTakehiroTanakaDepartment of Pathology and Oncology, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama UniversityYoshinobuMaedaDepartment of Hematology, Oncology and Respiratory Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesKadoakiOhashiDepartment of Allergy and Respiratory Medicine, Okayama University HospitalPulmonary sclerosing pneumocytoma (PSP) is a rare form of lung cancer that occasionally presents with lymph node and extrapulmonary metastases, and multiple lesions. The treatment of metastatic PSP remains undefined. This study reports the case of a 48-year-old female patient diagnosed with PSP following surgical intervention for a solitary nodule in the left lower lobe. Four years later, recurrence occurred in the left hilar and mediastinal lymph nodes, necessitating an additional resection. Concurrently, sacral metastases developed and required palliative radiotherapy. Genetic analysis identified an AKT1 E17K mutation, characteristic of PSP, and absence of programmed cell death ligand 1 (PD-L1) expression in the tumor. Two years post-recurrence, the tumor recurred in the left mammary gland and mediastinal lymph nodes. Combination immunotherapy with ipilimumab and nivolumab yielded a significantly positive response in this metastatic PSP case. This is the first reported case of successful treatment of multiple distant metastatic PSP with ipilimumab and nivolumab, following the failure of various local treatments. Further case series are warranted to validate the efficacy of immunotherapy in metastatic PSP.No potential conflict of interest relevant to this article was reported.Acta Medica Okayama2024Establishment and Analysis of Novel In Vitro 3D Cell Culture Models of the Fibrotic Tumor Microenvironment in Pancreatic CancerENHiroyoshiTANAKAOkayama UniversityNo potential conflict of interest relevant to this article was reported.Springer Science and Business Media LLCActa Medica Okayama2168-818416112024Axillary Reactive Lymphoid Hyperplasia, Likely Due to Unicentric Castleman Disease, and the Concurrent Presence of Orbital Mucosa-Associated Lymphoid Tissue (MALT) Lymphoma: A Six-Year Follow-Up Studye73775ENToshihikoMatsuoDepartment of Ophthalmology, Graduate School of Interdisciplinary Science and Engineering in Health Systems, Okayama UniversityTakehiroTanakaDepartment of Pathology, Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama UniversityTomokazuFujiDepartment of Gastroenterological Surgery, Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama UniversityDaisukeEnnishiDepartment of Hematology and Oncology, Center for Comprehensive Genomic Medicine, Okayama University HospitalCastleman disease is a lymphadenopathy of unknown cause at a single site, which is designated as unicentric Castleman disease, or at multiple sites designated as multicentric Castleman disease. We present a patient who showed axillary reactive lymphoid hyperplasia, likely due to unicentric Castleman disease, and orbital extranodal marginal zone B-cell lymphoma of mucosa-associated lymphoid tissue (MALT) lymphoma in a six-year follow-up. A 76-year-old man had a painless left axillary mass for an unknown period and also left complete blepharoptosis with no other systemic symptoms. Suspected of lymphoma, iliac bone marrow biopsy showed no anomalous cells, and positron emission tomography demonstrated abnormal uptake at the left axilla and in the left superior anterior orbit. Incisional biopsy of the left axillary mass demonstrated hyperplastic lymphoid follicles with an atrophic germinal center and prominent small vessels in the follicular center, indicative of unicentric Castleman disease. One year later, annual follow-up positron emission tomography disclosed a high uptake site, next to the previously-identified cyst, in the pancreatic body. Trans-gastric fine needle pancreatic biopsy proved adenocarcinoma and he underwent subtotal stomach-preserving pancreaticoduodenectomy with jejunal anastomosis. He was well for six months after the surgery and thus, underwent resection of the left orbital lesion at 78 years old. The pathology of the orbital lesion showed ambiguous nodular structure with massive infiltration with CD20-positive medium-sized lymphoid cells which were κ monotype in immunoglobulin light chain restriction, indicative of MALT lymphoma. In the four-year period of the COVID-19 pandemic, he was healthy and followed with no treatment until the age of 82 years when he underwent radiation (46 Gy) to the left axillary lesion which did not regress. He then underwent eyelid levator muscle plication for left blepharoptosis since the left orbital lesion remained unpalpable. The six-year follow-up showed that concurrent and independent orbital MALT lymphoma and axillary reactive lymphoid hyperplasia, likely due to unicentric Castleman disease, were both stable. The present case illustrates how important it is to make pathological diagnoses in different anatomical lesions after the initial diagnosis of Castleman disease.No potential conflict of interest relevant to this article was reported.Springer Science and Business Media LLCActa Medica Okayama2168-818416102024Presumed Choroidopathy of IgG4-Related Disease Discovered During 16-Year Follow-Up of a Patient With Polycystic Kidney Diseasee70865ENToshihikoMatsuoOphthalmology, Graduate School of Interdisciplinary Science and Engineering in Health Systems, Okayama UniversityTakehiroTanakaPathology, Okayama University HospitalKenjiTsujiNephrology, Okayama University HospitalImmunoglobulin G4 (IgG4)-related disease is characterized by infiltration with IgG4-producing plasma cells in different organs and the elevation of serum IgG4. We present a patient with polycystic kidney disease in long-term follow-up who developed bilateral lacrimal gland enlargement and presumed IgG4-related choroidopathy at different time points. A 45-year-old woman developed bilateral upper eyelid swelling. Head MRI showed bilateral lacrimal gland enlargement, and the resection on both sides revealed foci of infiltration with lymphocytes and plasma cells in bilateral lacrimal glands. The IgG4-immunostaining did not satisfy the diagnostic criteria. She had been taking oral valsartan 40 mg daily for hypertension with polycystic kidney disease.<br>
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The patient was well until the age of 49 years, when she noticed yellowish vision in the right eye compared to the left eye. The right eye showed multiple yellowish spotty lesions in the deep retina to choroid with a mildly hyperemic optic disc, while the left eye showed the normal fundus. No inflammation was noted in the anterior segments of both eyes. Fundus angiography demonstrated early-phase no-filling with late-phase leakage by fluorescein dye and both early-phase and late-phase no-filling by indocyanine green dye, leading to the diagnosis of acute posterior multifocal placoid pigment epitheliopathy (APMPPE). She began to have oral prednisolone tapered from 30 mg daily and discontinued in a year. At the age of 52 years, she switched to candesartan 8 mg daily and began to have tolvaptan (a selective competitive vasopressin receptor 2 (V2) antagonist) 90 mg daily for polycystic kidney disease with liver cysts. At that time, the lesions in the right eye had mild degeneration.<br>
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The patient was followed once a year ophthalmologically to maintain good vision. At 57 years, serum IgG4, which was measured for the first time on suspicion of IgG4-related disease, was elevated to 269.6 mg/dL. In the following four years to the latest visit at 61 years, she kept stable but high levels of serum IgG4 around 300 mg/dL. Serum IgG4 measurement is helpful to make a clinical diagnosis and, hence, a clinical decision since the spectrum of IgG4-related disease remains obscure.No potential conflict of interest relevant to this article was reported.BMCActa Medica Okayama1472-68312412024Histological differences related to autophagy in the minor salivary gland between primary and secondary types of Sjögren's syndrome1099ENHitomiOno-MinagiDepartment of Cytology and Histology, Dentistry and Pharmaceutical Sciences, Okayama University Graduate School of MedicineTsutomuNohnoDepartment of Cytology and Histology, Okayama University Medical SchoolKiyofumiTakabatakeDepartment of Oral Pathology and Medicine, Faculty of Medicine, Dentistry and Pharmaceutical Sciences, Okayama UniversityTakehiroTanakaDepartment of Pathology, Faculty of Medicine, Dentistry and Pharmaceutical Sciences, Okayama UniversityTakayukiKatsuyamaDepartment of Nephrology, Rheumatology, Endocrinology and Metabolism, Okayama University HospitalKohtaMiyawakiDivision of Precision Medicine, Kyushu University School of MedicineJunWadaDepartment of Nephrology, Rheumatology, Endocrinology and Metabolism, Faculty of Medicine, Dentistry and Pharmaceutical Sciences, Okayama UniversitySoichiroIbaragiDepartment of Oral and Maxillofacial Surgery, Faculty of Medicine, Dentistry and Pharmaceutical Sciences, Okayama UniversitySeijiIidaDepartment of Oral and Maxillofacial Reconstructive Surgery, Faculty of Medicine, Dentistry and Pharmaceutical Sciences, Okayama UniversityTadashiYoshinoDepartment of Pathology, Dentistry and Pharmaceutical Sciences, Okayama University Graduate School of MedicineHitoshiNagatsukaDepartment of Oral Pathology and Medicine, Faculty of Medicine, Dentistry and Pharmaceutical Sciences, Okayama UniversityTakayoshiSakaiDepartment of Rehabilitation for Orofacial Disorders, Osaka University Graduate School of DentistryHideyoOhuchiDepartment of Cytology and Histology, Faculty of Medicine, Dentistry and Pharmaceutical Sciences, Okayama UniversitySome forms of Sjögren’s syndrome (SS) follow a clinical course accompanied by systemic symptoms caused by lymphocyte infiltration and proliferation in the liver, kidneys, and other organs. To better understand the clinical outcomes of SS, here we used minor salivary gland tissues from patients and examine their molecular, biological, and pathological characteristics. A retrospective study was performed, combining clinical data and formalin-fixed paraffin-embedded (FFPE) samples from female patients over 60 years of age who underwent biopsies at Okayama University Hospital. We employed direct digital RNA counting with nCounter® and multiplex immunofluorescence analysis with a PhenoCycler™ on the labial gland biopsies. We compared FFPE samples from SS patients who presented with other connective tissue diseases (secondary SS) with those from stable SS patients with symptoms restricted to the exocrine glands (primary SS). Secondary SS tissues showed enhanced epithelial damage and lymphocytic infiltration accompanied by elevated expression of autophagy marker genes in the immune cells of the labial glands. The close intercellular distance between helper T cells and B cells positive for autophagy-associated molecules suggests accelerated autophagy in these lymphocytes and potential B cell activation by helper T cells. These findings indicate that examination of FFPE samples from labial gland biopsies can be an effective tool for evaluating molecular histological differences between secondary and primary SS through multiplexed analysis of gene expression and tissue imaging.No potential conflict of interest relevant to this article was reported.岡山医学会Acta Medica Okayama0030-155813622024mRNA ワクチン8384ENYutaTanakaDepartment of Pharmacy, Okayama University HospitalYoshitoZamamiDepartment of Pharmacy, Okayama University HospitalNo potential conflict of interest relevant to this article was reported.Springer Science and Business Media LLCActa Medica Okayama1471-24152412024Pathological findings in enucleated eyes of patients with neurofibromatosis type 1: report of a case with 15-year follow-up and review of 14 patients in the literature341ENToshihikoMatsuoGraduate School of Interdisciplinary Science and Engineering in Health Systems, Okayama UniversityKenjiNishidaDepartment of Pathology, Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama UniversityTakehiroTanakaDepartment of Pathology, Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama UniversityTakayaSenoDepartment of Plastic and Reconstructive Surgery, Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama UniversityKiyoshiYamadaDepartment of Plastic and Reconstructive Surgery, Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama UniversityShigekiOnoDepartment of Neurological Surgery, General Medical Center, Kawasaki Medical SchoolBackgrounds Iris nodules are frequently noted as clinical manifestations of neurofibromatosis type 1 but the other intraocular manifestations are rare. The purpose of this study is to present a patient with a phthisic eye who underwent enucleation for a cosmetic reason after 15-year follow-up and also to review 14 patients with enucleation described in the literature.<br>
Case presentation A 17-year-old man with neurofibromatosis type 1 from infancy underwent the enucleation of phthisic left eye and also had the resection of eyelid subcutaneous mass lesions on the left side for a cosmetic reason. He had undergone four-time preceding surgeries for eyelid and orbital mass reduction on the left side in childhood and had developed total retinal detachment 10 years previously. Pathologically, the enucleated eye showed massive retinal gliosis positive for both S-100 and glial fibrillary acidic protein (GFAP) in the area with involvement of the detached retinal neuronal layer, together with a more fibrotic lesion along the choroid which were, in contrast, negative for both S-100 and GFAP. The choroid, ciliary body, and iris did not show apparent neurofibroma while episcleral neurofibroma was present.<br>
Literature review In review of enucleated eyes of 14 patients in the literature, buphthalmic eyes with early-onset glaucoma on the unilateral side was clinically diagnosed in 9 patients who frequently showed varying extent of hemifacial neurofibromatosis which involved the eyelid and orbit on the same side. Pathologically, neurofibromas in varying extent were found in the choroid of 12 patients. One patient showed choroidal malignant melanoma on the left side and fusiform enlargement of the optic nerve on the right side suspected of optic nerve glioma. The phthisic eye in another patient showed massive retinal gliosis similar to the present patient.<br>
Conclusions In summary of the 15 patients with neurofibromatosis type 1, including the present patient, buphthalmic or phthisic eyes with no vision were enucleated for cosmetic reasons and showed choroidal neurofibroma in most patients and massive retinal gliosis in two patients including the present patient.No potential conflict of interest relevant to this article was reported.Elmer Press, Inc.Acta Medica Okayama1923-41551582024Anterior Uveitis After Discontinuation of Janus Kinase Inhibitor, Ruxolitinib208214ENToshihikoMatsuoGraduate School of Interdisciplinary Science and Engineering in Health Systems, Okayama UniversityNaotoIkedaDepartment of Internal Medicine, Kaneda HospitalYasumasaMonobeDepartment of Pathology, General Medical Center, Kawasaki Medical SchoolTakehiroTanakaDepartment of Pathology, Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama UniversityPrimary myelofibrosis shows widespread fibrosis in the bone marrow and is part of myeloproliferative neoplasms in which gene mutations in hematopoietic stem cells lead to abnormal clonal expansion of one or more lineage of myeloid and erythroid cells and megakaryocytes. Janus kinase (JAK) inhibitors are the main therapeutic regimen for primary myelofibrosis which harbors gene mutations, resulting in continuous activation of JAK-STAT signaling pathway. Since JAK inhibitors modulate immunological state, the administration would have a potential for uveitis. A 67-year-old patient presented with weight loss of 10 kg in the past 2 years after his retirement. He showed normocytic anemia with anisocytosis and abnormal shape, as well as hepatosplenomegaly. Suspected of hematological malignancy, bone marrow biopsy led to the diagnosis of primary myelofibrosis (grade 2) with bizarre megakaryocytes and relative maintenance of myeloid and erythroid lineage. He started to have blood transfusion. Genomic DNA analysis of the peripheral blood showed a pathogenic variant in the exon 9 of calreticulin (CALR) gene while pathogenic variants in Janus kinase-2 (JAK2), and myeloproliferative leukemia virus oncogene (MPL) were absent. He began to have oral ruxolitinib 10 mg daily at the timepoint of 5 months after the initial visit and the dose was increased to 20 mg daily 8 months later but was discontinued further 4 months later because he showed the limited effect of ruxolitinib. He had blood transfusion every week or every 2 weeks in the following 2 months until he noticed blurred vision in the right eye. The right eye showed thick fibrin membrane formation in the anterior chamber in front of the pupil which prevented the fundus from visualization. The left eye showed no inflammation and optic nerve atrophy, sequel to tuberculous meningitis in childhood. The patient started to use 0.1% betamethasone six times daily and 1% atropine once daily as eye drops. A week later, fibrin membrane disappeared and the pupillary area with total iris posterior synechia was visible in the right eye. He regained the vision in the right eye and did not show relapse of uveitis only with topical 0.1% betamethasone. Uveitis might be related with the administration and discontinuation of ruxolitinib.No potential conflict of interest relevant to this article was reported.Acta Medica Okayama2024Promising Gene Therapy Using an Adenovirus Vector Carrying REIC/Dkk-3 Gene for the Treatment of Biliary CancerENEmiTANAKAGraduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama UniversityNo potential conflict of interest relevant to this article was reported.Japanese Society for Lymphoreticular Tissue ResearchActa Medica Okayama1346-42806422024Spontaneous regression and rare relapse after excisional biopsy in long-term observation of 31 patients with primary conjunctival lymphoma8696ENToshihikoMatsuoGraduate School of Interdisciplinary Science and Engineering in Health Systems, Okayama UniversityTakehiroTanakaDepartment of Pathology, Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama UniversityTo elucidate long-term outcome in primary conjunctival lymphoma, a review was conducted of 31 consecutive patients: 21 men and 10 women with an age range of 28 to 85 (median, 61) years at presentation and follow-up periods ranging from 1 to 19 (median, 7) years. Conjunctival lymphoma was on the right side in 10 patients, on the left side in 12, and on both sides in 9. Upper, lower, or both fornix lesions in 28 patients were all diagnosed as extranodal marginal zone B-cell lymphoma of mucosa-associated lymphoid tissue (MALT lymphoma), while thick nasal bulbar conjunctival lesions in 3 patients were differently diagnosed as MALT lymphoma, diffuse large B-cell lymphoma, and follicular lymphoma, respectively. Seven patients underwent local radiation (30 Gy): as initial treatment in 5 patients and treatment for relapse in 2 patients. The remaining 24 patients were observed without additional treatment after excisional biopsy: 5 of these 24 patients showed relapse 0.5 to 6 years later and underwent excisional biopsy again that revealed MALT lymphoma. Of the 5 patients with relapse, only one with second-time relapse underwent radiation. Fluorodeoxyglucose positron emission tomography was performed in 18 patients and showed no systemic lesions: high uptake was noted in the residual conjunctival lesions of 4 patients and in the relapsed conjunctival lesions of 3 patients. One patient died of rectal cancer while no patients died of lymphoma. Observation is an option in patients with primary conjunctival lymphoma after excisional biopsy. Radiation is a treatment option in the case of relapse.No potential conflict of interest relevant to this article was reported.WileyActa Medica Okayama2050-09041252024Decades of stability of conjunctival vascular malformations in two patientse8933ENToshihikoMatsuoGraduate School of Interdisciplinary Science and Engineering in Health Systems, Okayama UniversityTakehiroTanakaDepartment of Pathology, Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama UniversityYoshihiroKimataDepartment of Plastic and Reconstructive Surgery, Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama UniversityA 65-year-old woman with diabetic retinopathy underwent glaucoma surgery to construct a filtering bleb adjacent to conjunctival hemangioma, and showed bleb function and stable hemangioma for a decade. A 1.5-year-old girl with right eye lid and cheek swelling by orbital to facial lymphangioma was followed for visual acuity development. Conjunctival lymphangioma was stable in 20 years.No potential conflict of interest relevant to this article was reported.BMCActa Medica Okayama1471-230X2412024Endoscopic manifestation of intestinal transplant-associated microangiopathy after stem cell transplantation140ENMasayaIwamuroDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesDaisukeEnnishiDepartment of Hematology and Oncology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesNobuharuFujiiDepartment of Hematology and Oncology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesKen-IchiMatsuokaDepartment of Hematology and Oncology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesTakehiroTanakaDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesToshihiroInokuchiDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesSakikoHiraokaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesMotoyukiOtsukaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesBackground Endoscopic features of intestinal transplant-associated microangiopathy (iTAM) have not been comprehensively investigated. This study aimed to examine the endoscopic characteristics of patients diagnosed with iTAM.<br>
Methods This retrospective analysis included 14 patients pathologically diagnosed with iTAM after stem cell transplantation for hematolymphoid neoplasms (n = 13) or thalassemia (n = 1). The sex, age at diagnosis, endoscopic features, and prognosis of each patient were assessed. Serological markers for diagnosing transplant-associated thrombotic microangiopathy were also evaluated.<br>
Results The mean age at the time of iTAM diagnosis was 40.2 years. Patients diagnosed based on the pathognomonic pathological changes of iTAM presented with diverse symptoms at the times of endoscopic examinations, including diarrhea (n = 10), abdominal pain (n = 5), nausea (n = 4), appetite loss (n = 2), bloody stools (n = 2), abdominal discomfort (n = 1), and vomiting (n = 1). At the final follow-up, six patients survived, while eight patients succumbed, with a median time of 100.5 days (range: 52-247) post-diagnosis. Endoscopic manifestations included erythematous mucosa (n = 14), erosions (n = 13), ulcers (n = 9), mucosal edema (n = 9), granular mucosa (n = 9), and villous atrophy (n = 4). Erosions and/or ulcers were primarily observed in the colon (10/14, 71%), followed by the ileum (9/13, 69%), stomach (4/10, 40%), cecum (5/14, 36%), duodenum (3/10, 30%), rectum (4/14, 29%), and esophagus (1/10, 10%). Cytomegalovirus infection (n = 4) and graft-versus-host disease (n = 2) coexisted within the gastrointestinal tract. Patients had de novo prolonged or progressive thrombocytopenia (6/14, 43%), decreased hemoglobin concentration (4/14, 29%), reduced serum haptoglobin level (3/14, 21%), and a sudden and persistent increase in lactate dehydrogenase level (2/14, 14%). Peripheral blood samples from 12 patients were evaluated for schistocytes, with none exceeding 4%.<br>
Conclusions This study provides a comprehensive exploration of the endoscopic characteristics of iTAM. Notably, all patients exhibited erythematous mucosa throughout the gastrointestinal tract, accompanied by prevalent manifestations, such as erosions (93%), ulcers (64%), mucosal edema (64%), granular mucosa (64%), and villous atrophy (29%). Because of the low positivity for serological markers of transplant-associated thrombotic microangiopathy in patients with iTAM, endoscopic evaluation and biopsy of these lesions are crucial, even in the absence of these serological features.No potential conflict of interest relevant to this article was reported.岡山医学会Acta Medica Okayama0030-155813612024脳腫瘍の術中蛍光診断711ENShotaTanakaDepartment of Neurological Surgery, Faculty of Medicine, Dentistry and Pharmaceutical Sciences. Okayama UniversityNo potential conflict of interest relevant to this article was reported.Okayama University Medical SchoolActa Medica Okayama0386-300X7822024Sigle Agent of Posttransplant Cyclophosphamide Without Calcineurin Inhibitor Controls Severity of Experimental Chronic GVHD123134ENKyosukeSaekiDepartment of Hematology and Oncology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesHideakiFujiwaraDepartment of Hematology and Oncology, Okayama University HospitalKeisukeSeikeDepartment of Hematology and Oncology, Okayama University HospitalTaigaKuroiDepartment of Hematology and Oncology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesHisakazuNishimoriDepartment of Hematology and Oncology, Okayama University HospitalTakehiroTanakaDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesKen-ichiMatsuokaDepartment of Hematology and Oncology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesNobuharuFujiiDivision of Transfusion, Okayama University HospitalYoshinobuMaedaDepartment of Hematology and Oncology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesOriginal Article10.18926/AMO/66915Chronic graft-versus-host disease (GVHD) is a major cause of late death and morbidity following allogeneic hematopoietic cell transplantation (HCT), but its pathogenesis remains unclear. Recently, haplo-identical HCT with post-transplant cyclophosphamide (Haplo-HCT with PTCY) was found to achieve a low incidence rate of acute GVHD and chronic GVHD. However, while the pathogenesis of acute GVHD following Haplo-HCT with PTCY has been well investigated, that of chronic GVHD remains to be elucidated, especially in HLA-matched HCT with PTCY. Based on its safety profile, PTCY is currently applied for the human leucocyte antigen (HLA)-matched HCT setting. Here, we investigated the mechanisms of chronic GVHD following HLA-matched HCT with PTCY using a well-defined mouse chronic GVHD model. PTCY attenuated clinical and pathological chronic GVHD by suppressing effector T-cells and preserving regulatory T-cells compared with a control group. Additionally, we demonstrated that cyclosporine A (CsA) did not show any additional positive effects on attenuation of GVHD in PTCY-treated recipients. These results suggest that monotherapy with PTCY without CsA could be a promising strategy for the prevention of chronic GVHD following HLA-matched HCT.No potential conflict of interest relevant to this article was reported.Nature PortfolioActa Medica Okayama2045-23221412024Long-term monitoring of gastric mucosa-associated lymphoid tissue lymphoma in patients with extra copies of the MALT1 gene4953ENMasayaIwamuroDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesRyutaTakenaka Department of Internal Medicine, Tsuyama Chuo HospitalKojiMiyaharaDepartment of Internal Medicine, Hiroshima City HospitalShotaroOkanoueDepartment of Gastroenterology, Mitoyo General HospitalMasaoYoshiokaDepartment of Internal Medicine, Okayama Saiseikai General HospitalChihiroSakaguchiDepartment of Gastroenterology, Shikoku Cancer CenterKumikoYamamotoDepartment of Gastroenterology, Kagawa Prefectural Central HospitalYoshinariKawaiDepartment of Gastroenterology, Onomichi Municipal HospitalTatsuyaToyokawaDepartment of Gastroenterology, Fukuyama Medical CenterTakehiroTanakaDepartment of Pathology, Okayama University HospitalMotoyukiOtsukaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesThe objective of this study was to clarify the long-term prognosis of patients with gastric mucosa-associated lymphoid tissue (MALT) lymphoma with additional copies of MALT1. In this multicenter retrospective study, we enrolled 145 patients with gastric MALT lymphoma who underwent fluorescence in situ hybridization (FISH) analysis to detect t(11;18) translocation. The patient cohort was divided into three groups: Group A (n = 87), comprising individuals devoid of the t(11;18) translocation or extra MALT1 copies; Group B (n = 27), encompassing patients characterized by the presence of the t(11;18) translocation; and Group C (n = 31), including patients with extra MALT1 copies. The clinical outcomes in each cohort were collected. Over the course of a mean follow-up of 8.5 ± 4.2 years, one patient died of progressive MALT lymphoma, while 15 patients died due to etiologies unrelated to lymphoma. The progression or relapse of MALT lymphoma was observed in 11 patients: three in Group A, two in Group B, and six in Group C. In Groups A, B, and C, the 10-year overall survival rates were 82.5%, 93.8%, and 86.4%, respectively, and the 10-year event-free survival rates were 96.1%, 96.0%, and 82.9%, respectively. The event-free survival rate in Group C was significantly lower than that in Group A. However, no differences were observed in the 10-year event-free survival rates among individuals limited to stage I or II1 disease (equivalent to excluding patients with stage IV disease in this study, as there were no patients with stage II2), with rates of 98.6%, 95.8%, and 92.3% for Groups A, B, and C, respectively. In conclusion, the presence of extra copies of MALT1 was identified as an inferior prognostic determinant of event-free survival. Consequently, trisomy/tetrasomy 18 may serve as an indicator of progression and refractoriness to therapeutic intervention in patients with gastric MALT lymphoma, particularly stage IV gastric MALT lymphoma.No potential conflict of interest relevant to this article was reported.岡山大学大学院社会文化科学研究科Acta Medica Okayama1881-1671572024利用者が介護士へ信頼感を抱く場面に関する質的研究―介護士の対人関係形成能力の向上のための心理教育法開発に向けて―111126ENSayumiMIYAKETomokoTANAKA10.18926/66831No potential conflict of interest relevant to this article was reported.岡山大学文学部学芸員課程Acta Medica Okayama102018学芸員課程 Newsletter 第10号EN10.18926/66813No potential conflict of interest relevant to this article was reported.岡山大学教師教育開発センターActa Medica Okayama2186-1323142024防災教育に向けた基礎的検討 災害ボランティアにおける過失経験の内実223237ENRyotaTANAKAMakiishi Elementary SchoolYuichiHARAFaculty of Education，Okayama University10.18926/CTED/66783近年，学校教育において災害ボランティアを通した防災教育の意義が改めて注目されている。しかし災害ボランティア全般において，活動中の過失とその後の対応を巡るトラブルが課題となっている。活動中の過失に対し，どのような対応がなされているのかについて具体的な文脈から整理し，防災教育に還元する必要がある。そこで本研究は，被災地で活動する災害ボランティア実施者を対象に過失経験についてインタビュー調査を行い，活動中に発生した過失への対応とその意味づけについて明らかにすることを目的とした。過失後の対応は，「報告」「否定」「隠蔽」「甘受」に大別され，それぞれの対応に対する意味づけから「交換」という共通の原理が働いていることが考察された。この原理とボランティアとしての心構えを考慮して防災教育を展開することで，生徒が安全にかつ，活動自体を多角的・多面的に捉え直すことにつながることが示唆された。No potential conflict of interest relevant to this article was reported.岡山大学教師教育開発センターActa Medica Okayama2186-1323142024幼稚園における食物アレルギー教育に関する教員研修の実施とその評価 食物アレルギーの有無に関わらず，心身共に健康な生活を送る子供の育成をめざして4755ENYumikoSHINTAKUKindergarten Attached to the School Education, Okayama UniversityFusakoIYAMAKindergarten Attached to the School Education, Okayama UniversityChiyoKUROSUMIKindergarten Attached to the School Education, Okayama UniversityKouheiABEKindergarten Attached to the School Education, Okayama UniversityKayoKOTANIKindergarten Attached to the School Education, Okayama UniversityMayumiTAKATORIKindergarten Attached to the School Education, Okayama UniversityKeitaOKADAKindergarten Attached to the School Education, Okayama UniversityMahoTANAKAKindergarten Attached to the School Education, Okayama UniversitySaoriMIKIKindergarten Attached to the School Education, Okayama University10.18926/CTED/66771 本研究の目的は，幼稚園において食物アレルギーと共に生活する子供を育む方策を検討することである。本研究では，食物アレルギー教育に関する教員研修を行い，研修中の教員の反応と研修前後のアンケート調査の結果を基に，その効果を評価した。<br>
研修後には,食物アレルギーやその対応によって生じる子供達の心境へも目を向ける必要性の理解が深まった。また事例検討を通して，幼稚園においても幼児なりに食物アレルギーを理解して対応できるように伝える必要性があると明らかになり，実際に指導できそうな具体的な場面も挙げられた。さらに研修中，脈々と受け継がれてきた“教育観”と，現在の多様化した時代背景や子供達の実態，社会的なつながりを踏まえて更新される“教育観”の中で揺れ動く教員の姿が見られ，その揺らぎや葛藤自体が，個別のニーズを適切に受け入れ，多様性を尊重する教師の観念を磨くことにつながっていると考えられた。No potential conflict of interest relevant to this article was reported.Okayama University Medical SchoolActa Medica Okayama0386-300X7812024Regression of Necrotic Lesions after Methotrexate Withdrawal in Patients with Methotrexate-Associated Lymphoproliferative Disorders: A Retrospective CT Study2936ENTakahiroKitayamaDepartment of Radiology, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama UniversityTakashiTanakaDepartment of Radiology, Okayama City HospitalYuichiroKanieDepartment of Radiology, Okayama University HospitalYoheiMarukawaDepartment of Radiology, Okayama Saiseikai General HospitalKatsuhideKojimaDepartment of Radiology, Okayama University HospitalTakehiroTanakaDepartment of Pathology, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama UniversitySoshiTakaoDepartment of Epidemiology, Faculty of Medicine, Dentistry and Pharmaceutical Sciences, Okayama UniversityTakaoHirakiDepartment of Radiology, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama UniversityOriginal Article10.18926/AMO/66668This retrospective study investigated whether necrotic lesions detected on a computed tomography (CT) scan are more regressive than non-necrotic lesions after methotrexate withdrawal in patients pathologically diagnosed with methotrexate-associated lymphoproliferative disorders (MTX-LPD). In total, 89 lesions extracted from 24 patients on CT scans were included in the analysis. All patients had been evaluated for the presence of necrosis within lesions via CT scan upon first suspicion of MTX-LPD (baseline CT scan). The percentage lesion size reduction between the baseline and initial follow-up CT scan was calculated. The association between necrosis within lesions and size changes was estimated via linear regression analyses using both crude and adjusted models. Necrosis was significantly more common in extranodal lesions (27 out of 30 lesions, 90%) than in nodal lesions (9 out of 59 lesions, 15%, p<0.001). In the crude model, the regression of necrotic lesions was 58.5% greater than that of non-necrotic lesions; the difference was statistically significant (p<0.001). Additionally, the longest diameter of necrotic lesions at the baseline CT scan was significantly greater than that of non-necrotic lesions (p<0.001). Based on the adjusted model, necrotic lesions showed 49.3% greater regression than non-necrotic lesions (p=0.017). Necrosis detected on a CT scan was found to be an independent predictor of regression after MTX withdrawal in patients with MTX-LPD.No potential conflict of interest relevant to this article was reported.岡山大学農学部Acta Medica Okayama2186-77551132024Effect of seed cold PEG-priming and subsequent long storage on germination, growth and flowering of Eustoma grandiflorum（Raf.）Shinn ʻExe Lavenderʼ710ENThao ThuPhanGraduate School of Environmental and Life Science, Okayama UniversityKeigoFukushimaHiroshima Prefectural Technology Research Institute, Agricultural Technology Research CenterYoshiyukiTanakaGraduate School of Environmental and Life Science, Okayama UniversityKen-ichiroYasubaGraduate School of Environmental and Life Science, Okayama UniversityYuichiYoshidaGraduate School of Environmental and Life Science, Okayama UniversityTanjuroGotoGraduate School of Environmental and Life Science, Okayama UniversityCold wet treatment is frequently applied to Eustoma seeds to enhance the bolting rate of plants grown under high temperatures. Our previous study indicated that cold PEG‒primed Eustoma seeds could maintain their germination rate and bolting rate even after being re‒dried for 30days and grown under high temperatures. The present study aimed to investigate whether prolonged storage after cold PEG‒priming affect the germination, growth, and flowering of Eustoma ‘Exe Lavender’ seedling. Seeds were initially cold‒primed with water or PEG‒6000 at ‒1.5 MPa for 5 weeks at 10°C in the dark and were then subjected to re‒drying and storage for 30, 60, 90 and 360days at 10°C. After 360days of storage, cold PEG‒primed seeds germinated earlier and more effectively than cold hydro‒primed seeds. Compared to the results after 30days of storage, plants grown from 360days exhibited similar bolting rate, days to bolting, bolting node and flowering rate, cut flower length and number of flower node. These results suggest that ‘Exe Lavender’ seeds can germinate and develop well even after 360days of storage and under high temperature conditions when subjected to cold PEG‒6000 treatment.No potential conflict of interest relevant to this article was reported.ElsevierActa Medica Okayama0003-267012782023Determination of mass-dependent chromium isotopic compositions in geological samples by double spike-total evaporation-thermal ionization mass spectrometry (DS-TE-TIMS)341723ENDilan M.RatnayakeThe Pheasant Memorial Laboratory for Geochemistry and Cosmochemistry, Institute for Planetary Materials, Okayama UniversityRyojiTanakaThe Pheasant Memorial Laboratory for Geochemistry and Cosmochemistry, Institute for Planetary Materials, Okayama UniversityEizoNakamuraThe Pheasant Memorial Laboratory for Geochemistry and Cosmochemistry, Institute for Planetary Materials, Okayama UniversityBackground: Chromium isotopes have been used to trace geochemical and cosmochemical processes in the past. However, the presence of multivalent Cr species has made it difficult to isolate Cr from geological samples, particularly for samples with a low Cr mass fraction.<br>
Results: Here, a simple three-step ion exchange chromatography procedure is presented to separate Cr from various sample matrices, ranging from ultramafic to felsic rocks. Throughout each of the column chromatography step, 1 mL of cation exchange resin AG50W-X8 (200–400 mesh) was used as the stationary phase and oxalic acid as a chelating agent, was used in addition to the inorganic acids. This method yielded high recoveries of Cr [93 ± 8% (2SD, N = 7)] regardless of the lithology. The total procedural blank of Cr was <0.5 ng. We also developed a double spike-total evaporation-thermal ionization mass spectrometry (DS-TE-TIMS) technique that significantly reduced sample consumption to ∼20 ng of Cr per each measurement of mass-dependent 53Cr/52Cr.<br>
Significance: This study achieved a 2SD external precision of 0.02‰ for the analysis of NIST NBS3112a and of 0.01–0.07‰ for the geological samples. This study enabled high-precision Cr isotope analysis in geological samples with various matrix and Cr compositions using relatively small sample volumes.No potential conflict of interest relevant to this article was reported.WileyActa Medica Okayama2050-090411122023Nontuberculous mycobacterial abscess of lacrimal sac and eyelid debridement: Case reporte8364ENToshihikoMatsuoGraduate School of Interdisciplinary Science and Engineering in Health Systems, Okayama UniversityTakehiroTanakaDepartment of Pathology, Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama UniversityKiyoshiYamadaDepartment of Plastic and Reconstructive Surgery, Okayama University HospitalMotokoNoseDepartment of Clinical Laboratory, Okayama University HospitalYasushiTanimotoDepartment of Allergy and Respiratory Medicine, Okayama University HospitalA 56-year-old otherwise healthy woman developed abscess from dacryocystitis in the right lower eyelid. The smear of puncture fluid showed acid-fast bacilli and Mycobacterium abscessus was identified after a month. The early start of clarithromycin/ethambutol was switched to clarithromycin/levofloxacin. Debridement specimen after 7-month treatment showed granulomatous tissue with no bacilli.No potential conflict of interest relevant to this article was reported.Georg Thieme Verlag KGActa Medica Okayama2364-372210052022Resection depth for small colorectal polyps comparing cold snare polypectomy, hot snare polypectomy and underwater endoscopic mucosal resectionE602E608ENJunkiToyosawaDepartment of Gastroenterology, Okayama University HospitalYasushiYamasakiDepartment of Gastroenterology, Okayama University HospitalTsuyoshiFujimotoDepartment of Gastroenterology, Iwakuni Clinical CenterShouichiTanakaDepartment of Gastroenterology, Iwakuni Clinical CenterTakehiroTanakaDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesToshiharuMitsuhashiCenter for Innovative Clinical Medicine, Okayama University HospitalHiroyukiOkadaDepartment of Gastroenterology, Okayama University HospitalBackground and study aims Small colorectal polyps are removed by various methods, including cold snare polypectomy (CSP), hot snare polypectomy (HSP), and underwater endoscopic mucosal resection (UEMR), but the indications for using these methods are unclear. We retrospectively assessed the efficacy of CSP, HSP, and UEMR for small polyps, focusing on the depth of the resected specimens.<br>
Patients and methods Outpatients with non-pedunculated small polyps (endoscopically diagnosed as 6 to 9 mm), resected by two endoscopists between July 2019 and September 2020, were enrolled. We histologically evaluated the specimens resected via CSP, HSP, and UEMR. The main outcome was the containment rate of the muscularis mucosa (MM) and submucosa (SM) tissues.<br>
Results Forty polyps resected via CSP (n = 14), HSP (n = 12), or UEMR (n = 14) were enrolled after excluding 13 polyps with resection depths that were difficult to determine. The rates of specimens containing MM and SM tissue differed significantly (57 % and 29 % for CSP, 92 % and 83 % for HSP, and 100 % and 100 % for UEMR, respectively (P = 0.005 for MM and P < 0.001 for SM tissue). Multiple logistic regression analysis showed UEMR was an independent factor relating to the containment of SM tissue. The thickness of SM tissue by CSP, HSP, and UEMR were 52 μm, 623 μm, and 1119 μm, respectively (P < 0.001). The thickness by CSP was significantly less than those by HSP and UEMR (P < 0.001, Bonferroni correction).<br>
Conclusions UEMR could be the best method to contain SM tissue without injection. Further studies are needed to evaluate the indication of UEMR for small polyps.No potential conflict of interest relevant to this article was reported.BMCActa Medica Okayama1880-65467312023Connective tissue mast cells store and release noradrenaline24ENYusukeOtaniDepartment of General Thoracic Surgery and Breast and Endocrinological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesSoichiroYoshikawaDepartment of Cellular Physiology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesKeiNagaoDepartment of Cellular Physiology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesTakehiroTanakaDepartment of Pathology and Oncology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesShinichiToyookaDepartment of General Thoracic Surgery and Breast and Endocrinological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesAtsushiFujimuraDepartment of Cellular Physiology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesMast cells are present in mucosal and connective tissues throughout the body. They synthesize and release a wide variety of bioactive molecules, such as histamine, proteases, and cytokines. In this study, we found that a population of connective tissue mast cells (CTMCs) stores and releases noradrenaline, originating from sympathetic nerves. Noradrenaline-storing cells, not neuronal fibers, were predominantly identified in the connective tissues of the skin, mammary gland, gastrointestinal tract, bronchus, thymus, and pancreas in wild-type mice but were absent in mast cell-deficient W-sash c-kit mutant KitW-sh/W-sh mice. In vitro studies using bone marrow-derived mast cells revealed that extracellular noradrenaline was taken up but not synthesized. Upon ionomycin stimulation, noradrenaline was released. Electron microscopy analyses further suggested that noradrenaline is stored in and released from the secretory granules of mast cells. Finally, we found that noradrenaline-storing CTMCs express organic cation transporter 3 (Oct3), which is also known as an extraneuronal monoamine transporter, SLC22A3. Our findings indicate that mast cells may play a role in regulating noradrenaline concentration by storing and releasing it in somatic tissues.No potential conflict of interest relevant to this article was reported.Okayama University Medical SchoolActa Medica Okayama0386-300X7752023Endoscopic Manifestations and Clinical Characteristics of Localized Gastric Light-Chain Amyloidosis545552ENMasayaIwamuroDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesShouichiTanakaDepartment of Gastroenterology, National Hospital Organization Iwakuni Clinical CenterTatsuyaToyokawaDepartment of Gastroenterology, National Hospital Organization Fukuyama Medical CenterMamoruNishimuraDepartment of Internal Medicine, Okayama City HospitalTakaoTsuzukiDepartment of Internal Medicine, Japanese Red Cross Society Himeji HospitalKojiMiyaharaDepartment of Internal Medicine, Hiroshima City Hiroshima Citizens HospitalShinNegishiDepartment of Gastroenterology, Kagawa Prefectural Central HospitalShogenOhyaKawaguchi Medical ClinicTakehiroTanakaDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesMotoyukiOtsukaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesOriginal Article10.18926/AMO/65978To determine the endoscopic and clinical features of localized gastric amyloid light-chain (AL) amyloidosis, we retrospectively examined the characteristics of nine patients (eight men and one woman) encountered by the hospitals in our network. Lesions were predominantly flat and depressed with surface vascular dilatation (n=5); others were characterized by subepithelial lesions (n=2), mucosal color change (n=1), and a mass-like morphology with swollen mucosal folds (n=1). Colonoscopy (n=7), video capsule enteroscopy (n=2), serum (n=5) and urine immunoelectrophoresis (n=4), and bone marrow examination (n=3) were performed to exclude involvement of organs other than the stomach. As treatment for gastric lesions of AL amyloidosis, one patient each underwent endoscopic submucosal dissection (n=1) and argon plasma coagulation (n=1), while the remaining seven patients underwent no specific treatment. During a mean follow-up of 4.2 years, one patient died 3.2 years after diagnosis, but the cause of death, which occurred in another hospital, was unknown. The remaining eight patients were alive at the last visit. In conclusion, although localized gastric AL amyloidosis can show various macroscopic features on esophagogastroduodenoscopy, flat, depressed lesions with vascular dilatation on the surface are predominant.No potential conflict of interest relevant to this article was reported.SAGE PublicationsActa Medica Okayama2324-7096112023Resection of Orbital Myxoma With Magnetic Resonance Imaging Evidence of Ethmoid Sinus Origin: Case Report and Review of 20 Patients in the Literature16ENToshihikoMatsuoOkayama UniversityTakehiroTanakaOkayama UniversityA 41-year-old woman showed a palpable mass at the superonasal orbital edge on the right side. Magnetic resonance imaging demonstrated a lobulated fluid-containing tubular mass which extended anteriorly to posteriorly along the medial orbital wall, nasal to the eyeball. She was followed once a year for 8 years until the age of 49 years when she decided to undergo surgical resection because of the enlarged mass. The lobulated large mass was resected and the pathology showed sparsely distributed spindle cells, positive for CD34, in alcian blue-positive mucous substances, indicative of myxoma. Postoperative magnetic resonance imaging showed residual lobulated tubular mass along the optic nerve on the medial side and superior to the eyeball. The residual orbital mass showed stable structure with more evident connection with the ethmoid sinus lesion, suggestive of the ethmoid origin, in 12 years until the age of 61 years. In the review of 20 patients with orbital myxomas in the literature, in addition to this case, roughly classified locations in the orbit were retrobulbar in 8 patients, on the lateral side of the orbit in 4, on the superior side in 6, on the medial side in 1 (this patient), and in the orbit with no specific description in 2. In pathological examinations, immunohistochemistry was not done in 8 patients, done but all negative in 2, and positive in 11 patients: nerve sheath myxoma was diagnosed in 3 patients based on positive S100 staining. Orbital myxoma is rare but considered in differential diagnosis of orbital masses.No potential conflict of interest relevant to this article was reported.WileyActa Medica Okayama2692-4609212021Fever and electrocoagulation syndrome after colorectal endoscopic submucosal dissection for patients with immunosuppressants and steroidse83ENShumpeiYamamotoDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama UniversityHideakiKinugasaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama UniversityYasushiYamasakiDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama UniversityMamiHiraiDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama UniversitySoichiroAkoDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama UniversityKensukeTakeiDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama UniversityShokoIgawaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama UniversityErikoYasutomiDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama UniversityShoheiOkaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama UniversityMasayasuOhmoriDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama UniversityToshihiroInokuchiDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama UniversityKeitaHaradaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama UniversitySakikoHiraokaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama UniversityKazuhiroNousoDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama UniversityTakehiroTanakaDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama UniversityHiroyukiOkadaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama UniversityObjectives: Transient fever and electrocoagulation syndrome after colorectal endoscopic submucosal dissection (ESD) remain a challenge. The aim of this study was to assess the risk factors of post-ESD fever and post-ESD coagulation syndrome (PECS), focusing on the involvement of immunosuppressive drugs and steroids (IM).<br>
Methods: This retrospective analysis included 510 patients who underwent colorectal ESD at Okayama University Hospital from 2015 to 2020. The incidence rate, clinical outcome, and factors associated with post-ESD fever and PECS were investigated.<br>
Results: Post-ESD fever and PECS occurred in 63 patients (12.4%) and 43 patients (8.4%), respectively. In multivariate analysis, the American Society of Anesthesiologists Physical Status ≥3, the use of immunosuppressants or prednisolone ≥5mg (IM group), and injury to muscle layer/perforation were significantly associated with post-ESD fever. In PECS, IM group, tumors located on the right side, treatment time ≥60 min, injury to the muscle layer, and multiple lesions were independent risk factors. Both post-ESD fever and PECS improved conservatively in the IM group, and no serious complication was observed.<br>
Conclusions: The use of IM was a risk factor for both post-ESD fever and PECS. However, there were no serious complications in colorectal ESD for patients taking IM.No potential conflict of interest relevant to this article was reported.Georg Thieme Verlag KGActa Medica Okayama2364-372210062022Prospective multicenter study of the efficacy and safety of cold forceps polypectomy for ≤ 6-mm non-ampullary duodenal low-grade adenomasE712E718ENHiromitsuKanzakiDepartment of Gastroenterology, Okayama University HospitalJoichiroHoriiDepartment of Gastroenterology, Fukuyama Medical CenterRyutaTakenakaDepartment of Internal Medicine, Tsuyama Central HospitalHiroyukiNakagawaDepartment of Endoscopy, Hiroshima City Hiroshima Citizens HospitalKazuhiroMatsuedaDepartment of Gastroenterology and Hepatology, Kurashiki Central HospitalTakaoTsuzukiDepartment of Internal Medicine, Himeji Red Cross HospitalMasahideKitaDepartment of Gastroenterology, Okayama City HospitalYasushiYamasakiDepartment of Gastroenterology, Okayama University HospitalTakehiroTanakaDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesMasayaIwamuroDepartment of Gastroenterology, Okayama University HospitalSeijiKawanoDepartment of Gastroenterology, Okayama University HospitalYoshiroKawaharaDepartment of Practical Gastrointestinal Endoscopy, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesJunTomodaDepartment of Internal Medicine, Akaiwa Medical Association HospitalHiroyukiOkadaDepartment of Gastroenterology, Okayama University HospitalBackground and study aims Because the endoscopic treatment for non-ampullary duodenal adenoma (NADA) has a non-negligible risk of adverse events (AEs), a safe and easy treatment for NADA is desirable. This was a multicenter prospective trial evaluating the efficacy and safety of cold forceps polypectomy (CFP) for diminutive NADAs.<br>
Patients and methods This study was prospectively conducted at six general hospitals and one university hospital. The inclusion criteria were histologic and endoscopic diagnosis of low-grade NADA measuring ≤ 6 mm. A second endoscopy was scheduled for 1 month after CFP. After confirmation of the success of CFP, 6-month and 12-month surveillance endoscopies were scheduled. The primary endpoint was the endoscopic and histologic disease disappearance rates at the 12-month endoscopy.<br>
Results Thirty-nine lesions from 38 patients were prospectively included. Median tumor size at enrollment was 5 mm (range 3–6 mm). There were four cases of remnant lesions at the second endoscopy, and the lesion disappearance rate of single CFP was 89.7 % (35 /39; 95 % confidence interval (CI), 76.9 %–97.9 %). In three cases, complete removal of the lesion was achieved with a single re-CFP, but one case required four repeat CFPs. The lesion disappearance rate at 12-month endoscopy was 97.4 % (38 /39; 95 %CI, 86.8 %–99.5 %). During the follow-up period, no AEs related to CFP were observed.<br>
Conclusions CFP for NADA ≤ 6 mm was safe and effective in this study. This common endoscopic method to remove lesions may be an option for treatment of diminutive NADAs.No potential conflict of interest relevant to this article was reported.Acta Medica Okayama2005Accuracy of a portable electroneurometer for measuring distal motor latencyENHidekiTanakaNo potential conflict of interest relevant to this article was reported.Cell PressActa Medica Okayama2405-8440972023Expression and clinicopathological characteristics of PDX1, PTF1A, and SALL4 in large and small ducts of ectopic pancreas located in gastro-duodenum and jejunume18241ENMengxiChenDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesTakehiroTanakaDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesTakuroIgawaDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesYanyanHanDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesFangliPengDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesZaishunJinDepartment of Pathology, Mudanjiang Medical UniversityTadashiYoshinoDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesAn ectopic pancreas is defined as pancreatic tissue outside its normal location, anatomically separated from the pancreas.<br>
The transcription factor pancreas/duodenum homeobox protein 1 (PDX1) is involved in maintaining the pancreas and functions in early pancreatic development, beta cell differentiation, and endocrine non beta cells. Pancreatic transcription factor 1 subunit alpha (PTF1A) affects exocrine cell formation and regulation of acinar cell identity, and is expressed in exocrine cells as a transcription factor. The depletion of SALL4 disrupts self-renewal and induces differentiation.<br>
To clarify which of PDX1, PTF1A, or SALL4 determines the difference in Heinrich's classification, we examined the localization and number of positive cells. We analyzed the differential expression of PDX1, PTF1A, and SALL4 in large and small ducts in ectopic pancreas by immunohistochemistry. Results showed that the number of PTF1A-positive cells in large ducts was more widespread in type I than in type II in the gastro-duodenum, and more SALL4-positive cells were noticed in large ducts than in small ducts in the gastro-duodenum of type II. Our results revealed that PTF1A might promote exocrine differentiation in developing the pancreatic tissues, and that those with widespread expression differentiate into exocrine cells.No potential conflict of interest relevant to this article was reported.Okayama University Medical SchoolActa Medica Okayama0386-300X7742023Feasibility of Flow Cytometry Analysis of Gastrointestinal Tract-Residing Lymphocytes in Hematopoietic Stem Cell Transplant Recipients347357ENMasayaIwamuroDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesTakumiKondoDepartment of Hematology and Oncology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesDaisukeEnnishiDepartment of Hematology and Oncology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesNobuharuFujiiDepartment of Hematology and Oncology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesKen-ichiMatsuokaDepartment of Hematology and Oncology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesTakahideTakahashiDivision of Medical Support, Okayama University HospitalArakiHirabataDivision of Medical Support, Okayama University HospitalTakehiroTanakaDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesFumioOtsukaDepartment of General Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesYoshinobuMaedaDepartment of Hematology and Oncology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesHiroyukiOkadaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesOriginal Article10.18926/AMO/65740The feasibility of lymphocyte isolation and flow cytometry using a single endoscopic biopsy specimen from the gastrointestinal tract of patients who have undergone hematopoietic stem cell transplantation has not been investigated. We acquired 51 endoscopic biopsy specimens from the gastrointestinal tract of 35 patients. We divided the flow cytometry samples into two groups: group A, successful lymphocyte isolation (n=24), and group B, incomplete isolation (n=27). We compared the backgrounds of the samples between the groups to reveal crucial elements in the successful isolation of lymphocytes residing in the gastrointestinal tract. Comparison between the groups revealed lymphocyte isolation success rates differed between biopsy sites. Isolation was most successful in samples from the duodenum (8/9, 88.9%), followed by the ileum (4/8, 50.0%), large intestine (4/11, 36.4%), and stomach (8/23, 34.8%). Tacrolimus was used more frequently in group B (92.6%) than in group A (62.5%) (p=0.015). Logistic regression analysis revealed that isolation from the duodenum or ileum was a significant factor for successful isolation, while tacrolimus use was not statistically significant. In conclusion, the duodenum and ileum are more suitable sites than the stomach and colorectum for acquiring samples for flow cytometry.No potential conflict of interest relevant to this article was reported.MDPIActa Medica Okayama1467-30374572023Update in Molecular Aspects and Diagnosis of Autoimmune Gastritis52635275ENMasayaIwamuroDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesTakehiroTanakaDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesMotoyukiOtsukaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesRecent studies have advanced our understanding of the pathophysiology of autoimmune gastritis, particularly its molecular aspects. The most noteworthy recent advancement lies in the identification of several candidate genes implicated in the pathogenesis of pernicious anemia through genome-wide association studies. These genes include PTPN22, PNPT1, HLA-DQB1, and IL2RA. Recent studies have also directed attention towards other genes such as ATP4A, ATP4B, AIRE, SLC26A7, SLC26A9, and BACH2 polymorphism. In-depth investigations have been conducted on lymphocytes and cytokines, including T helper 17 cells, interleukin (IL)-17A, IL-17E, IL-17F, IL-21, IL-19, tumor necrosis factor-α, IL-15, transforming growth factor-β1, IL-13, and diminished levels of IL-27. Animal studies have explored the involvement of roseolovirus and H. pylori in relation to the onset of the disease and the process of carcinogenesis, respectively. Recent studies have comprehensively examined the involvement of autoantibodies, serum pepsinogen, and esophagogastroduodenoscopy in the diagnosis of autoimmune gastritis. The current focus lies on individuals demonstrating atypical presentations of the disease, including those diagnosed in childhood, those yielding negative results for autoantibodies, and those lacking the typical endoscopic characteristics of mucosal atrophy. Here, we discuss the recent developments in this field, focusing on genetic predisposition, epigenetic modifications, lymphocytes, cytokines, oxidative stress, infectious agents, proteins, microRNAs, autoantibodies, serum pepsinogen, gastrin, esophagogastroduodenoscopy and microscopic findings, and the risk of gastric neoplasm.No potential conflict of interest relevant to this article was reported.SpringerActa Medica Okayama2168-81841552023Collagenous Colitis in a Patient With Gastric Cancer Who Underwent Chemotherapye39466ENMasayaIwamuroDepartment of Gastroenterology and Hepatology, Okayama University HospitalTakehiroTanakaDepartment of Pathology, Okayama University HospitalShunsukeKagawaDepartment of Gastroenterological Surgery, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesShokoInooDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesMotoyukiOtsukaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesHerein, we present a case of collagenous colitis in a patient who underwent chemotherapy for gastric cancer, comprising five cycles of S-1 plus oxaliplatin and trastuzumab, followed by five cycles of paclitaxel and ramucirumab and seven cycles of nivolumab. The subsequent initiation of trastuzumab deruxtecan chemotherapy led to the development of grade 3 diarrhea after the second cycle of treatment. Collagenous colitis was diagnosed via colonoscopy and biopsy. The patient's diarrhea improved following the cessation of lansoprazole. This case highlights the importance of considering collagenous colitis as a differential diagnosis, in addition to chemotherapy-induced colitis and immune-related adverse event (irAE) colitis, in patients with similar clinical presentations.No potential conflict of interest relevant to this article was reported.SAGE PublicationsActa Medica Okayama2324-7096112023Bilateral Lacrimal Gland Mantle Cell Lymphoma in 11-Year Follow-Up: Case Report and Review of 48 Cases With Ocular Adnexal Presentation in the LiteratureENToshihikoMatsuoOkayama UniversityTakehiroTanakaOkayama UniversityKazuyaOkadaKurashiki Central HospitalKenjiNotoharaKurashiki Central HospitalKeikoFujiiOkayama University HospitalNobuharuFujiiOkayama University HospitalA 63-year-old woman, with 11-year history of breast cancer, showed bilateral lacrimal gland enlargement on magnetic resonance imaging. Gallium-67 scintigraphy, as the standard at that time in 2004, demonstrated abnormally high uptake only in bilateral lacrimal glands. The lacrimal glands were extirpated and the pathological diagnosis was mantle cell lymphoma (MCL). She underwent bilateral orbital radiation, based on no uptake of gallium-67 in other sites of the body. In a month, bone marrow biopsy revealed the infiltration with MCL, positive for cyclin D1. She showed hepatic lymphadenopathy and splenomegaly, and so received 2 cycles of alternating Hyper-CVAD therapy and high-dose methotrexate with cytarabine, combined with rituximab, in 2 months, leading to complete remission. She underwent autologous peripheral blood stem cell transplantation and was well until the age of 68 years when she showed a recurrent intratracheal submucosal lesion of lymphoma and underwent one course of reduced-dose CHOP combined with rituximab. Next year, the left rib resection revealed the metastasis of breast adenocarcinoma, leading to daily oral letrozole. Further 2 years later, computed tomographic scan demonstrated multiple submucosal nodular lesions in the trachea and bronchi, together with cervical and supraclavicular lymphadenopathy, and intratracheal lesion biopsy and bone marrow biopsy proved the involvement with MCL. She underwent 2 courses of bendamustine and rituximab, resulting in complete remission but died of metastatic breast cancer at the age of 74 years. Clinical features in 48 previous cases with ocular adnexal MCL in the literature were summarized in this study.No potential conflict of interest relevant to this article was reported.岡山大学理学部地球科学科Acta Medica Okayama1340-74142912023岡山県吉備中央町賀陽周辺の古第三系〜新第三系の地質と吉備高原面のゆるやかな曲隆127ENHajimeTANAKASeibu Engineering Consultants Co., Ltd.ShigeyukiSUZUKIDepartment of Earth Sciences, Okayama University10.18926/ESR/65479The Paleogene to Neogene successions which are composed of the Paleogene Kayo Formation, the late Oligocene to earliest Miocene Yagane Formation and the middle Miocene Ukan Formation are sporadically distributed in the Kibi Plateau region, surrounding area of Kibichuou Town, Okayama Prefecture, Southwest Japan. The gravel of the Kayo Formation occupied paleo-valley of Pre-Paleogene basement. The Yagane and Ukan formations unconformably overlay Pre-Paleogene rocks and occupy the gentle valley on the Kibi Surface as valley fill deposits.<br>
The fluvial of the Kayo Formation is mainly composed of conglomerate with minor amount of sandstone and mudstone. The fluvial Yagane Formation is mainly composed of conglomerate and associated with sandstone, mudstone and coal beds. The marine Ukan Formation is subdivided into 3 members, the Yamagata Muddy sandstone Member (YMM), the Shimoyokomi Sandstone Member (SSM) and the Tsuneyama Mudstone Member (TMM) in ascending order. The YMM is characterized by the bio-disturbed very poorly sorted muddy sandstone with frequent burrows, which indicate tidal flat deposits. The SSM is mainly composed of parallel bedded well-sorted sandstone with occasional burrows, which suggest near shore deposits. The TMM is composed of homogeneous clay rich mudstone, which implies off shore deposits.<br>
The boundary between the SSM and TMM (the contact of the sandstone and mudstone) is distinctive and correlative throughout the study area. The boundary is considered to be formed under similar water depth. The variations of the boundary height indicate a later ground movement. From the north to the south in about 25km distance, the height of the boundary changes 260m (in Ukan), 300m (in Takeshou), 360m (in Kibikogentoshi) and 260m (in Nichiouji). It indicates that a very gentle upwarping of the Kibi Plateau Surface was formed after the deposition of the Miocene.No potential conflict of interest relevant to this article was reported.Baishideng Publishing Group Acta Medica Okayama1007-932729122023Review of lymphoma in the duodenum: An update of diagnosis and management18521862ENMasayaIwamuroDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesTakehiroTanakaDepartment of Pathology, Okayama University HospitalHiroyukiOkadaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesThe presentation, subtype, and macroscopic images of lymphoma vary depending on the site of the tumor within the gastrointestinal tract. We searched PubMed for publications between January 1, 2012 and October 10, 2022, and retrieved 130 articles relating to duodenal lymphoma. A further 22 articles were added based on the manual screening of relevant articles, yielding 152 articles for full-text review. The most predominant primary duodenal lymphoma was follicular lymphoma. In this review, we provide an update of the diagnosis and man-agement of representative lymphoma subtypes occurring in the duodenum: Follicular lymphoma, diffuse large B-cell lymphoma, extranodal marginal zone lymphoma of mucosa-associated lymphoid tissue, mantle cell lymphoma, and T-cell lymphomas.No potential conflict of interest relevant to this article was reported.岡山大学大学院ヘルスシステム統合科学研究科Acta Medica Okayama2436-322732023〈迷惑〉意識の類型：『おだやかな死』における〈迷惑〉の用例分析を通じて3949ENNatsumiTANAKAGraduate School of Interdisciplinary Science and Engineering in Health Systems, Okayama University10.18926/interdisciplinary/65463In contemporary Japan, the elderly often say that they do not wish to be a burden on anyone, and they make important decisions with this motivation (here called feelings of "Meiwaku/Burden"). This paper seeks to categorize feelings of "Meiwaku/Burden" according to its relationship to the type of motivation they express. For this purpose, we focused on feelings of "Meiwaku/Burden" of elderly people in France. As there is no easily corresponding phrase in French for our word "Meiwaku/Burden", the French use several different words to express this sense "Meiwaku/Burden". Here we draw examples from Une mort très douce by Simone de Beauvoir, as well as her La Ceremonie des adieux.<br>
The analysis of examples given in these books indicates that "Meiwaku/Burden" of the elderly is motivated by three factors: relationships (déranger), emotions (ennuyer), and body/physical (gêner). In this paper, according to these three motivations we categorize feelings of "Meiwaku/Burden" three types: the feelings of "Meiwaku/Burden" about relationships, the feelings of "Meiwaku/Burden" about emotions, and the feelings of "Meiwaku/Burden" about bodily/physical things.No potential conflict of interest relevant to this article was reported.Springer Acta Medica Okayama2168-818414102022A Novel Method for Detecting Lanthanum Phosphate Deposition in the Gastroduodenal Mucosa Using Fluorescence Microscopye30729ENMasayaIwamuroDepartment of Gastroenterology and Hepatology, Okayama University HospitalHaruoUrataCentral Research Laboratory, Okayama University Medical SchoolSatoshiIwasaCentral Research Laboratory, Okayama University Medical SchoolTakehiroTanakaDepartment of Pathology, Okayama University HospitalYoshiroKawaharaDepartment of Practical Gastrointestinal Endoscopy, Okayama University HospitalHoroyukiOkadaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesDiagnostic utility of fluorescence microscopy for lanthanum phosphate deposition in the gastrointestinal mucosa has not been reported previously. In this study, we comparatively assessed the light, electron, and fluorescence microscopy features of gastroduodenal lanthanum phosphate deposition in 10 patients with deposits in the stomach and 5 patients with deposits in the duodenum. During light microscopy, lanthanum deposits were observed as dark-brown, needle-shaped, or crystalloid structures and pale red amorphous materials. During electron microscopy, the deposited material appeared as bright aggregates. Fluorescence microscopy also revealed lanthanum deposits as bright areas under green, red, and blue filters. The deposits were more easily recognizable on electron and fluorescence microscopy than on light microscopy. Furthermore, during fluorescence microscopy, the green filter provided the most clear visualization of lanthanum phosphate. In conclusion, fluorescence microscopy with a green filter is useful in determining the degree and extent of lanthanum deposition in the gastroduodenal mucosa.No potential conflict of interest relevant to this article was reported.Springer Science and Business Media LLCActa Medica Okayama0925-85583212023Against verb-stranding VP-ellipsis in Japanese: reply to Funakoshi (2016)128ENHidekazuTanakaFaculty of Letters, Okayama UniversityJapanese has a deletion operation, called argument ellipsis, that targets arguments (Oku in A theory of selection and reconstruction in the minimalist program, 1998). The operation does not apply to adjuncts, and thus, adjuncts are unelidable. Funakoshi (J East Asian Linguist 25(2):113–42, 2016), following in the footsteps of Otani and Whitman (Linguist Inquiry 22:345–58, 1991), argues that adjuncts can be elided when V-stranding VP-deletion applies. This article refutes Funakoshi’s proposal. Under rigorous control, adjuncts are generally unelidable even when the context strongly favors the adjunct inclusive interpretation, showing that the language lacks VP-deletion. It is also shown that, for a small number of speakers who permit the adjunct inclusive interpretation, the interpretation is sensitive to island constraints. The observation is attributed to covert right dislocation (Tanaka in J Linguist 37:551–79, 2001), marginally available for such speakers.No potential conflict of interest relevant to this article was reported.岡山医学会Acta Medica Okayama0030-155813432022第28回日本遺伝性腫瘍学会学術集会学会報告192194ENToshiyoshiFujiwaraDepartment of Gastroenterological Surgery, Faculty of Medicine, Dentistry and Pharmaceutical Sciences, Okayama UniversityKohjiTanakayaNational Hospital Organization Iwakuni Clinical CenterKunitoshiShigeyasuMinimally Invasive Therapy Center, Okayama University HospitalNo potential conflict of interest relevant to this article was reported.Frontiers MediaActa Medica Okayama2234-943X132023Impact of cancer-associated fibroblasts on survival of patients with ampullary carcinoma1072106ENKoseiTakagiDepartment of Gastroenterological Surgery, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesKazuhiroNomaDepartment of Gastroenterological Surgery, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesYasuoNagaiDepartment of Gastroenterological Surgery, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesSatoruKikuchiDepartment of Gastroenterological Surgery, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesYuzoUmedaDepartment of Gastroenterological Surgery, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesRyuichiYoshidaDepartment of Gastroenterological Surgery, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesTomokazuFujiDepartment of Gastroenterological Surgery, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesKazuyaYasuiDepartment of Gastroenterological Surgery, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesTakehiroTanakaDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesHajimeKashimaDepartment of Gastroenterological Surgery, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesTakahitoYagiDepartment of Gastroenterological Surgery, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesToshiyoshiFujiwaraDepartment of Gastroenterological Surgery, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesBackground: Cancer-associated fibroblasts (CAFs) reportedly enhance the progression of gastrointestinal surgery; however, the role of CAFs in ampullary carcinomas remains poorly examined. This study aimed to investigate the effect of CAFs on the survival of patients with ampullary carcinoma. <br>
Materials and methods: A retrospective analysis of 67 patients who underwent pancreatoduodenectomy between January 2000 and December 2021 was performed. CAFs were defined as spindle-shaped cells that expressed alpha-smooth muscle actin (alpha-SMA) and fibroblast activation protein (FAP). The impact of CAFs on survival, including recurrence-free (RFS) and disease-specific survival (DSS), as well as prognostic factors associated with survival, was analyzed. <br>
Results: The high-alpha-SMA group had significantly worse 5-year RFS (47.6% vs. 82.2%, p = 0.003) and 5-year DSS (67.5% vs. 93.3%, p = 0.01) than the low-alpha-SMA group. RFS (p = 0.04) and DSS (p = 0.02) in the high-FAP group were significantly worse than those in the low-FAP group. Multivariable analyses found that high alpha-SMA expression was an independent predictor of RFS [hazard ratio (HR): 3.68; 95% confidence intervals (CI): 1.21-12.4; p = 0.02] and DSS (HR: 8.54; 95% CI: 1.21-170; p = 0.03). <br>
Conclusions: CAFs, particularly alpha-SMA, can be useful predictors of survival in patients undergoing radical resection for ampullary carcinomas.No potential conflict of interest relevant to this article was reported.岡山大学大学院社会文化科学研究科Acta Medica Okayama1881-1671552023AUC-GS学習モデルに基づくオンライン版エクササイズへの興味と活用の認識5560ENTomokoTanaka10.18926/65125No potential conflict of interest relevant to this article was reported.Cureus Inc.Acta Medica Okayama2168-818414112022Increased CCR4+ and Decreased Central Memory CD4+ T Lymphocytes in the Background Gastric Mucosa of Patients Developing Gastric Cancer After Helicobacter pylori Eradication: An Exploratory Studye31713ENMasayaIwamuroDepartment of Gastroenterology and Hepatology, Okayama University HospitalTakahideTakahashiDivision of Medical Support, Okayama University HospitalArakiHirabataDivision of Medical Support, Okayama University HospitalTakehiroTanakaDepartment of Pathology, Okayama University HospitalFumioOtsukaDepartment of General Medicine, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesHoroyukiOkadaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesThe composition of lymphocytes in the gastric mucosa following the eradication of Helicobacter pylori (H. pylori) in patients with and without gastric cancer has not been compared. This study performed a single spot analysis of gastric mucosal lymphocytes after H. pylori eradication in patients with (n = 13) and without (n = 20) gastric cancer. Our comprehensive analysis of lymphocyte composition in the gastric mucosa revealed that: i) the proportion of CD8+/CD3+ cells was relatively higher in the peri-tumor mucosa than in the background mucosa; ii) the proportion of CCR4+/CD3+ cells was higher, and the ratio of CD62L+/CD3+CD4+ cells was relatively lower in the gastric mucosa of cancer patients than in non-cancer patients; and iii) the proportion of CD45RA-CD62L+/CD3+CD4+ cells, namely, the central memory CD4+ T -cell fraction, was lower in the gastric mucosa of cancer patients than in non-cancer patients. Although the exact mechanism of the altered proportions of CCR4+/CD3+ and central memory CD4+ cells in the gastric mucosa of patients with cancer is unknown, focusing on lymphocytes in the gastric mucosa might help improve our understanding of gastric cancer development after H. pylori eradication.No potential conflict of interest relevant to this article was reported.Okayama University Medical SchoolActa Medica Okayama0386-300X7712023Scattered Tiny Whitish Protrusions in the Stomach Are a Clue to the Diagnosis of Autoimmune Gastritis7580ENMasayaIwamuroDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesTakehiroTanakaDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesKentaHamadaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesYoshiyasuKonoDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesHiromitsuKanzakiDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesSeijiKawanoDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesYoshiroKawaharaDepartment of Practical Gastrointestinal Endoscopy, Okayama University HospitalHiroyukiOkadaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesCase Report10.18926/AMO/64365Herein, we report two patients with autoimmune gastritis who had undergone multiple esophagogastroduodenoscopy procedures for 17 and 9 years, respectively, before their diagnosis. Instead, they had been diagnosed with and treated for Helicobacter pylori-associated gastritis. The correct diagnosis was made when scatterings of tiny whitish protrusions in the gastric mucosa were detected on esophagogastroduodenoscopy. Our findings suggest that scattered tiny whitish bumps may be a clue to the diagnosis of autoimmune gastritis.No potential conflict of interest relevant to this article was reported.岡山大学大学院社会文化科学研究科Acta Medica Okayama1880-9162222022逆カルチャーショックにおける弓引きモデルの検討1526ENTomokoTanakaMayumiWatanabe10.18926/64333逆カルチャーショックの存在は知られるが、その機序の解明は十分とは言い難い。滞在先によく馴染むほど再適応は困難になるとみる「弓引きモデル」が成り立つかどうかをRQ1、文化受容と帰国後のその変化をRQ2、逆カルチャーショックの心理的機序をRQ3として、日本人元留学生12名に半構造化面接を行った。渡航先は北米6名、欧州3名、オセアニア1名、アジア2名であった。語りから社会文化的な認知や行動の変容と維持を抽出し、KJ法を用いて分析した。帰国後切り替えられた文化行動には、表出性（双方向的授業、主張性、明言、相互性）、社会的圧力（自由さ、過度な気遣いなし、おおらかさ）、親近性（身体接触を伴う挨拶、フレンドリーさ、パーティー）のカテゴリが見いだされた。二文化性への態度として、習慣取り入れ、受容の態度、母文化拒否感、転換への消極性、スイッチングのカテゴリが認められた。弓引きモデルの該当例は8名見られた。滞在先で文化受容が進み、帰国後は二文化を客観視する2名は再適応の困難が小さく、俯瞰モデルと名付けられた。文化受容が限定的で母文化が比較的維持され、再適応の速やかな2名は維持モデルと名付けられた。滞在先での文化受容は逆カルチャーショックを潜在的に準備するが、母文化観が相対的でなく拒否的な場合に、再適応の難度が高まる。この機序は、文化受容の可逆性や準拠文化の択一性、文化的スイッチングの機能に関わる問いに繋がる。No potential conflict of interest relevant to this article was reported. The Japanese Society for Lymphoreticular Tissue ResearchActa Medica Okayama1346-42806242022Immunohistochemistry for IRTA1 and MNDA helps differentiate gastric MALT lymphoma from chronic gastritis/reactive lymphocyte hyperplasia195201ENYoshiyukiAyadaDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesTakuroIgawaDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesYusukeNaoiDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesKyosukeHorikawaDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesTetsuyaTabataDepartment of Pathology, National Hospital Organization Okayama Medical CenterTakehiroTanakaDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesTadashiYoshinoDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesIt is difficult to histologically differentiate extranodal marginal zone lymphoma of mucosa-associated lymphoid tissue (MALT lymphoma) from chronic gastritis (CG)/ reactive lymphoid hyperplasia (RLH). To determine whether immunohistochemistry for IRTA1 and MNDA can differentiate gastric MALT lymphoma from CG/RLH, we investigated 81 stomach biopsy specimens [Wotherspoon grade (WG) 1, 11 cases; WG 2, 9 cases; WG 3, 20 cases; WG 4, 31 cases; and WG 5, 10 cases]. According to a previously reported algorithm involving PCR for immunoglobulin heavy (IgH) chain locus rearrangement, all 81 cases were divided into three groups: CG/RLH (55 cases), MALT lymphoma (19 cases) groups, and IgH undetectable group (7 cases). We analyzed the CG/RLH and MALT lymphoma groups. The median percentage of IRTA1-positive cells was 0% (range 0%-90.6%) in the CG/RLH group and 43.5% (range 0%-97.6%) in the MALT lymphoma group (p < 0.0001). The median percentage of MNDA-positive cells was 32.4% (range 0%-97.6%) in the CG/RLH group and 55.1% (range 0%-97.6%) in the MALT lymphoma group (p = 0.0044). These results indicate that immunohistochemistry for IRTA1 and MNDA can help dif-ferentiate gastric MALT lymphoma from CG/RLH.No potential conflict of interest relevant to this article was reported.CureusActa Medica Okayama2168-818414122022Multiple White Plaques in the Esophagus: A Possible Case of Esophageal Mucosal Alteration Associated With Immune-Related Adverse Events of Immune Checkpoint Inhibitorse32710ENMasayaIwamuroDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesTakehiroTanakaDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesYoshiyasuKonoDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesSeijiKawanoDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesHoroyukiOkadaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesWe report two cases of multiple white plaques in the esophagus that emerged after the administration of immune checkpoint inhibitors. Both patients developed enterocolitis as immune-related adverse events associated with immune checkpoint inhibitors. Esophagogastroduodenoscopy revealed duodenal involvement and multiple white plaques in the esophagus. A biopsy of the esophagus showed predominant CD3+ lymphocyte infiltration, suggesting that esophageal mucosal alterations were associated with immune-related adverse events. In addition, histopathology showed keratinized stratified squamous epithelium in the first case while increased inflammatory cell infiltration in the intraepithelial and subepithelial layers was observed in the second case. These data suggest a different pathogenesis of the multiple esophageal white plaques between the two cases. Although further investigation is needed to elucidate the significance of these observations, recognition of the esophageal plaques may be important for prompt diagnosis of immune-related adverse events when associated with immune checkpoint inhibitors.No potential conflict of interest relevant to this article was reported.Hindawi LtdActa Medica Okayama2090-652820222022Zinc Acetate Dihydrate Tablet-Associated Gastritis Occurring in a Post-Hematopoietic Stem Cell Transplant Recipient4637707ENMasayaIwamuroDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesTakehiroTanakaDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesAkifumiMatsumuraDepartment of Hematology and Oncology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesSeijiKawanoDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesYoshiroKawaharaDepartment of Practical Gastrointestinal Endoscopy, Okayama University HospitalHiroyukiOkadaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesA 65-year-old Japanese woman underwent umbilical cord blood transplantation for acute myeloid leukemia. Zinc acetate dihydrate tablets were administered for hypozincemia after transplantation, and vomiting and appetite loss occurred soon thereafter. Esophagogastroduodenoscopy revealed mucosal redness, erosion, white coat adhesion, and ulcers. Although graft-versus-host disease, intestinal transplant-associated microangiopathy, and cytomegalovirus infection were considered as possible causes, we diagnosed the patient with zinc acetate dihydrate tablet-associated gastric mucosal alterations based on the endoscopic features. This case reinforces the notion that medication-associated gastric lesions should be suspected in patients taking zinc acetate dihydrate tablets.No potential conflict of interest relevant to this article was reported.Public Library ScienceActa Medica Okayama1932-62031792022Prevention of non-infectious pulmonary complications after intra-bone marrow stem cell transplantation in micee0273749ENYoshikoYamasuji-MaedaDepartment of Hematology and Oncology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesHisakazuNishimoriDepartment of Hematology and Oncology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesKeisukeSeikeDepartment of Hematology and Oncology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesAkiraYamamotoDepartment of Hematology and Oncology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesHideakiFujiwaraDepartment of Hematology and Oncology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesTaigaKuroiDepartment of Hematology and Oncology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesKyosukeSaekiDepartment of Hematology and Oncology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesHarukoFujinagaDepartment of Hematology and Oncology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesSachiyoOkamotoDepartment of Hematology and Oncology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesKen-IchiMatsuokaDepartment of Hematology and Oncology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesNobuharuFujiiDepartment of Transfusion Medicine, Okayama University HospitalTakehiroTanakaDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesMasahiroFujiiDepartment of Animal Resources, Advanced Science Research Center, Okayama UniversityKatsumiMominokiDepartment of Animal Resources, Advanced Science Research Center, Okayama UniversityTakuroKanekuraDepartment of Dermatology, Kagoshima University Graduate School of Medical and Dental SciencesYoshinobuMaedaDepartment of Hematology and Oncology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesNon-infectious pulmonary complications including idiopathic pneumonia syndrome (IPS) and bronchiolitis obliterans syndrome (BOS), which are clinical and diagnostic manifestations of lung chronic graft-versus-host disease (GVHD), cause significant mortality after allogeneic stem cell transplantation (SCT). Increasing evidence suggests that alloantigen reactions in lung tissue play a central role in the pathogenesis of IPS and BOS; however, the mechanism is not fully understood. Several clinical and experimental studies have reported that intrabone marrow (IBM)-SCT provides high rates of engraftment and is associated with a low incidence of acute GVHD. In the present study, allogeneic SCT was conducted in mouse models of IPS and BOS, to compare intravenous (IV)-SCT with IBM-SCT. Allogeneic IBM-SCT improved the clinical and pathological outcomes of pulmonary complications compared to those of IV-SCT. The mechanisms underlying the reductions in pulmonary complications in IBM-SCT mice were explored. The infiltrating lung cells were mainly CD11b+ myeloid and CD3+ T cells, in the same proportions as in transplanted donor cells. In an in vivo bioluminescence imaging, a higher proportion of injected donor cells was detected in the lung during the early phase (1 h after IV-SCT) than after IBM-SCT (16.7 +/- 1.1 vs. 3.1 +/- 0.7 x 10(5) photons/s/animal, IV-SCT vs. IBM-SCT, P = 1.90 x 10(-10)). In the late phase (5 days) after SCT, there were also significantly more donor cells in the lung after IV-SCT than after IBM-SCT or allogeneic-SCT (508.5 +/- 66.1 vs. 160.1 +/- 61.9 x 10(6) photons/s/animal, IV-SCT vs. IBM-SCT, P = 0.001), suggesting that the allogeneic reaction induces sustained donor cell infiltration in the lung during the late phase. These results demonstrated that IBM-SCT is capable of reducing injected donor cells in the lung; IBM-SCT decreases donor cell infiltration. IBM-SCT therefore represents a promising transplantation strategy for reducing pulmonary complications, by suppressing the first step in the pathophysiology of chronic GVHD.No potential conflict of interest relevant to this article was reported.Lippincott Williams & WilkinsActa Medica Okayama0025-7974101412022Endoscopic findings of gastric neoplasms in familial adenomatous polyposis are associated with the phenotypic variations and grades of dysplasiae30997ENMayuKobashiDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesMasayaIwamuroDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesSakikoKuraokaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesShokoInooDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesShotaroOkanoueDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesTakuyaSatomiDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesKentaHamadaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesMakotoAbeDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesYoshiyasuKonoDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesHiromitsuKanzakiDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesSeijiKawanoDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesTakehiroTanakaDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesYoshiroKawaharaDepartment of Practical Gastrointestinal Endoscopy, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesHiroyukiOkadaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesPatients with familial adenomatous polyposis (FAP) are at increased risk of developing gastric neoplasms. However, endoscopic findings have not been sufficiently investigated. We investigated the phenotypic expression of gastric adenoma (low-grade dysplasia) and gastric cancer (high-grade dysplasia or carcinoma) in patients with FAP and clarified their relationships to endoscopic findings. Of 29 patients with FAP who underwent esophagogastroduodenoscopy between 2005 and 2020, 11 (38%) had histologically confirmed gastric neoplasms, including 23 lesions of gastric adenoma and 9 lesions of gastric cancer. The gastric neoplasms were classified into 3 phenotypes (gastric, mixed, or intestinal type) according to the immunostaining results and evaluated for location (U or M region: upper or middle third of the stomach or L region: lower third of the stomach), color (same as the background mucosa, whitish, or reddish), macroscopic type (elevated, flat, or depressed), background mucosal atrophy (present or absent), fundic gland polyps in the surrounding mucosa (present or absent), and morphologic changes in tumor size. Elevated whitish gastric adenomas were further subdivided by macroscopic type (flat elevated, protruded, or elevated with a central depression) and color (milky- or pinkish-white). The gastric adenomas included gastric (11/23, 48%), mixed (4/23, 17%), and intestinal (8/23, 35%) phenotypes. In contrast, no lesions of gastric cancers showed a gastric phenotype (0/9, 0%), while 5 (56%) and 4 (44%) lesions were intestinal and mixed phenotypes, respectively. Gastric cancers were significantly more likely than gastric adenomas to present as reddish depressed lesions with gastric atrophy. All gastric-type adenomas occurred in non-atrophic mucosa, in mucosa with fundic gland polyps in the periphery, in the U or M region, and as flat elevated or protruded lesions with a milky-white color. Half of the lesions increased in size. Meanwhile, the typical endoscopic features of intestinal-type adenomas included occurrence in the L region and elevated pinkish-white lesions with central depression. None of the intestinal-type adenomas increased in size during the observation period. We believe that these endoscopic features will be useful for the prompt diagnosis and appropriate management of gastric neoplasms in patients with FAP.No potential conflict of interest relevant to this article was reported.Japanese Society for Lymphoreticular Tissue ResearchActa Medica Okayama1346-42806242022Diffuse large B-cell lymphoma in the course of systemic sarcoidosis: A case report and review of 30 Japanese patients with sarcoidosis-lymphoma syndrome226237ENToshihikoMatsuoGraduate School of Interdisciplinary Science and Engineering in Health Systems, Okayama UniversityTakehiroTanakaDepartment of Pathology, Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama UniversityRikaOmoteDepartment of Pathology, National Hospital Organization Fukuyama Medical CenterToshiakiOkadaDepartment of Respiratory Medicine, National Hospital Organization Fukuyama Medical CenterKenjiNotoharaDepartment of Pathology, Kurashiki Central HospitalKazuyaOkadaDepartment of Hematology/Oncology, Kurashiki Central HospitalWe report a patient with sarcoidosis who developed diffuse large B-cell lymphoma. A 71-year-old woman with persistent cough was diagnosed pathologically with sarcoidosis by resection of the right upper lung lobe with a nodule after an unsuccess�ful attempt of transbronchial needle aspiration for mediastinal lymphadenopathy. She was referred for an eye examination and found to have spotty retinal degeneration on the lower fundi of both eyes, together with residual macular edema and vitreous opacity in the left eye. At 76 years, she underwent cataract surgery and vitrectomy to gain a visual acuity of 0.6 in the left eye. At 77 years, she developed a cough and fever, and showed leukopenia and thrombocytopenia. Computed tomography showed multiple small nodular lesions in both lungs, and bilateral hilar, mediastinal, and hepatic lymphadenopathy. Fluorodeoxyglucose positron emission tomography demonstrated high uptake in the liver, spleen, pancreatic head, and lymph nodes. Bone marrow biopsy was intact, but liver biopsy revealed anomalous large lymphoid cells in the sinusoids which were positive for CD20 and showed a high Ki-67 index, leading to the diagnosis of diffuse large B-cell lymphoma. Chemotherapy with 8 courses of THP-COP (cyclophosphamide, pirarubicin, vincristine, and prednisolone) with rituximab, followed by intra�thecal injection of methotrexate, cytarabine, and dexamethasone, resulted in complete remission. She maintained complete remission for 10 years until 88 years old at present. The literature review found 30 patients, including this case, who developed lymphoma in the course of sarcoidosis. A novel pathological diagnosis is required in the setting of acute ymptomatic changes and novel lesions on imaging in patients with sarcoidosis.No potential conflict of interest relevant to this article was reported.Lippincott Williams & WilkinsActa Medica Okayama0025-7974101342022Site-specific differences in T lymphocyte composition of the gastric mucosa after Helicobacter pylori eradicatione30241ENMasayaIwamuroDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesTakahideTakahashiDivision of Medical Support, Okayama University HospitalNatsukiWatanabeDivision of Medical Support, Okayama University HospitalMakotoAbeDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesHiroyukiSakaeDepartment of General Medicine, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesYoshiyasuKonoDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesHiromitsuKanzakiDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesTakehiroTanakaDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesSeijiKawanoDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesFumioOtsukaDepartment of General Medicine, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesYoshiroKawaharaDepartment of Practical Gastrointestinal Endoscopy, Okayama University HospitalHiroyukiYanaiDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesHiroyukiOkadaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesIn our earlier work, we revealed that inflammation of the lesser curvature of the gastric body and antrum could constitute independent risk factors for gastric cancer development, while inflammation of the greater curvature was not. The aims of this study were as follows: first, to reveal the differences between T lymphocyte populations of the gastric antrum and the greater and lesser curvatures of the gastric body in patients after Helicobacter pylori eradication; second, to analyze the correlation between the composition of the stomach-resident T lymphocytes and time from H. pylori eradication; and third, to evaluate the sex differences in T lymphocyte subsets after H. pylori eradication. To investigate site-specific differences in stomach-resident T lymphocytes after H. pylori eradication, we performed flow cytometry analysis on samples taken from the gastric antrum, greater curvature of the gastric body, and lesser curvature of the gastric body of 20 patients. We also analyzed the correlation between the composition of the stomach-resident T lymphocytes and the time from H. pylori eradication. The lymphocyte subsets of the antrum and lesser curvature of the body were similar. In contrast, compared to those in the greater curvature of the gastric body, CD4(+)/CD3(+) lymphocyte subsets (43.8 +/- 19.4% vs 31.7 +/- 14.6%) were elevated in the lesser curvature of the body, whereas CD8(+)/CD3(+) (67.1 +/- 21.3% vs 80.4 +/- 12.0%), CD7(+)/CD3(+) (91.2 +/- 4.6% vs 93.7 +/- 3.8%), CCR4(+)/CD3(+) (7.7 +/- 8.1% vs 10.4 +/- 7.0%), CD45RA(+)/CD3(+)CD4(+) (27.2 +/- 24.8% vs 39.5 +/- 20.8%), and CD45RA(+)/CD3(+)CD4(-) (14.2 +/- 11.1% vs 18.7 +/- 11.5) were lower. Linear regression analysis showed a negative correlation between the time after H. pylori eradication and CD4(+)/CD3(+) (P < .05, R-2 = 0.198). There were no significant differences between men and women with respect to the lymphocyte populations. These results indicate that there are site-specific differences in lymphocyte composition in the stomach after H. pylori eradication.No potential conflict of interest relevant to this article was reported.Hindawi LtdActa Medica Okayama2090-652820222022Helicobacter suis-Associated Gastritis Mimicking Conventional H. pylori-Associated Atrophic Gastritis4254605ENMasayaIwamuroDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesSomay YamagataMurayamaDepartment of Fungal Infection, National Institute of Infectious DiseasesMasahikoNakamuraOmura Satoshi Memorial Institute, Kitasato UniversityKentaHamadaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesTakehiroTanakaDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesHiroyukiOkadaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesA 45-year-old Japanese man underwent esophagogastroduodenoscopy, which revealed spotty redness at the gastric fornix, mucosal swelling, diffuse redness in the corpus, and mucosal atrophy in the gastric angle and antrum. Histological examination showed rod-shaped bacteria that appeared larger than Helicobacter pylori. The patient tested positive for rapid urease test, and serum anti-H. pylori IgG antibody test results were negative. Further examination of the bacteria revealed that H. suis antibody test was positive, and the presence of H. suis was confirmed using H. suis-specific real-time PCR. H. suis was successfully eradicated after triple therapy with vonoprazan, amoxicillin, and clarithromycin. This case reinforces the notion that non-H. pylori Helicobacter species such as H. suis and H. heilmannii may be involved in the pathogenesis of active gastritis in patients who test negative for H. pylori antibodies.No potential conflict of interest relevant to this article was reported.Japanese Society for Lymphoreticular Tissue ResearchActa Medica Okayama1346-42806232022CD19 immunostaining of a stored paraffin-embedded vitrectomy cell block of intraocular lymphoma contributing to chimera antigen receptor T-cell therapy187189ENToshihikoMatsuoRegenerative and Reconstructive Medicine (Ophthalmology), Okayama University Graduate School of Interdisciplinary Science and Engineering in Health SystemsTakehiroTanakaPathology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesNobuharuFujiiHematology/Oncology and Division of Blood Transfusion, Okayama University HospitalKentaroFujiiNeurological Surgery, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesEiseiKondoHematology/Oncology, Kawasaki Medical SchoolNo potential conflict of interest relevant to this article was reported.The Japanese Society of Internal MedicineActa Medica Okayama0918-291861132022Zinc Acetate Dihydrate Tablet-associated Gastric Lesions19311938ENMasayaIwamuroDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesTakehiroTanakaDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesSakikoKuraokaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesKentaHamadaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesMakotoAbeDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesYoshiyasuKonoDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesHiromitsuKanzakiDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesSeijiKawanoDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesYoshiroKawaharaDepartment of Practical Gastrointestinal Endoscopy, Okayama University HospitalHiroyukiOkadaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesObjective This study aimed to determine the prevalence and endoscopic features of zinc acetate dihydrate tablet-associated gastric lesions. <br>
Methods We retrospectively examined the endoscopic features of 47 patients taking zinc acetate dihydrate tablets who underwent esophagogastroduodenoscopy. <br>
Results Gastric mucosal alterations, including redness, erosions, ulcers, and adhesion of the white coat, were observed in 29 of 47 patients (61.7%). Among patients with gastric lesions (group A), there was a sig-nificantly higher percentage of symptomatic patients in comparison to patients without lesions (group B) (65.5% vs. 22.2%; p<0.01). The background characteristics of the two groups did not differ to a statistically significant extent. On esophagogastroduodenoscopy, mucosal redness (n=27, 93.1%), erosions (n=26, 90.0%), adhesion of the white coat (n=25, 86.2%), and ulcers (n=9, 31.0%) were observed. None of the 19 patients who previously underwent esophagogastroduodenoscopy had gastric lesions before starting zinc acetate dihy-drate. Esophagogastroduodenoscopy was performed after the cessation of zinc acetate dihydrate intake in six patients, and revealed the resolution of gastric lesions. <br>
Conclusion Gastric lesions were observed in 29 of 47 patients who were taking zinc acetate dihydrate tab-lets. The most common endoscopic findings were mucosal redness (93.1%), erosions (90.0%), adhesion of the white coat (86.2%), and ulcers (31.0%). Although the exact pathogenesis is uncertain, we believe that un-derstanding the unique manifestations of this gastric lesion will help physicians manage adverse events in pa-tients taking zinc acetate dihydrate tablets.No potential conflict of interest relevant to this article was reported.SpringerActa Medica Okayama2198-7793812022Verrucous carcinoma of the esophagus with complete response after chemoradiotherapy128ENMasashiHashimotoDepartment of Gastroenterological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesYasuhiroShirakawaDepartment of Gastroenterological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesShunsukeTanabeDepartment of Gastroenterological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesTakehiroTanakaDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesNaoakiMaedaDepartment of Gastroenterological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesKazufumiSakuramaDepartment of Gastroenterological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesKazuhiroNomaDepartment of Gastroenterological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesToshiyoshiFujiwaraDepartment of Gastroenterological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesBackground : Verrucous carcinoma of the esophagus (VCE) is a rare tumor that is difficult to diagnose. In most cases, biopsies show nonspecific inflammatory and hyperkeratotic changes and do not show malignant findings. Most VCEs are slowly growing, locally advanced tumors with few metastases. Treatments for VCE are the same as for normal esophageal cancer, involving combined chemotherapy, surgical resection, and radiation therapy. However, it has been reported that VCE has a poor response to radiation or chemoradiotherapy (CRT). A case of VCE with complete response (CR) after CRT is presented. <br>
Case presentation : A 70-year-old man was found to have white, irregular esophageal mucosa 4 years earlier. He had been followed up as an outpatient as having candidal esophagitis. However, his tumor grew gradually, and biopsy was performed by endoscopic mucosal resection (EMR). He was finally diagnosed with VCE. He had no metastases to distant organs, but some lymph node metastases were suspected. The tumor invaded his left bronchus. The esophagostomy and gastrostomy were constructed as emergent procedures. The patient then underwent definitive CRT. 4 weeks after the end of CRT, two-stage esophagectomy was performed. First, he underwent esophagectomy with thoracic lymph node dissection. A latissimus dorsi flap was patched to the bronchus after primary suture of the hole. 6 weeks later, reconstruction of the gastric tube was performed through the antethoracic route. The pathological findings showed CR to CRT, with no proliferative cancer cells in the specimen. The patient has had no recurrence for three and half years after the resection. <br>
Conclusions : We presented a locally advanced VCE that achieved CR to CRT. In cases that have some difficulty for local resection, CRT might be an appropriate treatment for VCE.No potential conflict of interest relevant to this article was reported.MDPIActa Medica Okayama1467-30374462022Characterization of Gastric Tissue-Resident T Cells in Autoimmune and Helicobacter pylori-Associated Gastritis24432452ENDaisukeKametakaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesMasayaIwamuroDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesTakahideTakahashiDivision of Medical Support, Okayama University HospitalArakiHirabataDivision of Medical Support, Okayama University HospitalKentaHamadaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesYoshiyasuKonoDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesHiromitsuKanzakiDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesSeijiKawanoDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesTakehiroTanakaDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesFumioOtsukaDepartment of General Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesYoshiroKawaharaDepartment of Practical Gastrointestinal Endoscopy, Okayama University HospitalHiroyukiOkadaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesData regarding the in-depth surface marker profiles of gastric tissue-resident lymphocytes in autoimmune and Helicobacter pylori-associated gastritis are lacking. In this study, we investigated potential differences in lymphocyte composition between these profiles. We enrolled patients with autoimmune (n = 14), active (current infection of H. pylori in the stomach; n = 10), and inactive gastritis (post-eradication of H. pylori; n = 20). Lymphocytes were isolated from the greater curvature of the stomach and lesser curvature of the body and analyzed using flow cytometry. The CD8(+)/CD3(+) and CD4(+)/CD3(+) ratios differed between the samples. Body CD4(+)/antrum CD4(+), which is calculated by dividing the CD4(+)/CD3(+) ratio in the body by that in the antrum, was significantly higher in autoimmune gastritis (3.54 +/- 3.13) than in active (1.47 +/- 0.41) and inactive gastritis (1.42 +/- 0.77). Antrum CD8(+)/CD4(+) in autoimmune gastritis (7.86 +/- 7.23) was also higher than that in active (1.49 +/- 0.58) and inactive gastritis (2.84 +/- 2.17). The area under the receiver operating characteristic curve of antrum CD8(+)/CD4(+) was 0.842, and the corresponding optimal cutoff point was 4.0, with a sensitivity of 71.4% and a specificity of 93.3%. We propose that an antrum CD8(+)/CD4(+) ratio > 4.0 is a potential diagnostic marker for autoimmune gastritis.No potential conflict of interest relevant to this article was reported.BMCActa Medica Okayama1471-230X2212022Endoscopic features of oxyntic gland adenoma and gastric adenocarcinoma of the fundic gland type differ between patients with and without Helicobacter pylori infection: a retrospective observational study294ENMasayaIwamuroDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesChiakiKusumotoDepartment of Gastroenterology, Nippon Kokan Fukuyama HospitalMasahiroNakagawaDepartment of Endoscopy, Hiroshima City HospitalKazuhiroMatsuedaDepartment of Gastroenterology and Hepatology, Kurashiki Central HospitalSayoKobayashiDepartment of Internal Medicine, Fukuyama City HospitalMasaoYoshiokaDepartment of Internal Medicine, Okayama Saiseikai General HospitalTomokiInabaDepartment of Gastroenterology, Kagawa Prefectural Central HospitalTatsuyaToyokawaDepartment of Gastroenterology, Fukuyama Medical CenterChihiroSakaguchiDepartment of Endoscopy, National Hospital Organization Shikoku Cancer CenterShouichiTanakaDepartment of Gastroenterology, Iwakuni Clinical CenterTakehiroTanakaDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesHiroyukiOkadaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesBackground The endoscopic features of oxyntic gland adenoma and gastric adenocarcinoma of the fundic gland type have not been fully investigated in relation to Helicobacter pylori infection status. We compared the morphology, color, and location of these lesions between patients with and without H. pylori infection. Methods We retrospectively enrolled 165 patients (180 lesions) from 10 institutions. We divided the patients into the (i) Hp group (patients with current H. pylori infection [active gastritis, n = 13] and those with past infection [inactive gastritis, n = 76]) and (ii) uninfected group (H. pylori-uninfected patients, n = 52). We compared the clinical and endoscopic features of the two groups. We also performed an analysis between (i) lesions with atrophy of the surrounding gastric mucosa (atrophy group) and (ii) lesions without atrophy of the surrounding gastric mucosa (non-atrophy group). Results The average age was older in the Hp group than in the uninfected group (68.1 +/- 8.1 vs. 63.4 +/- 8.7 years, p < 0.01). Although the difference was not statistically significant (p = 0.09), multiple lesions were observed in 9 of 89 patients (10.1%) in the Hp group and in only 1 of 52 patients (1.9%) in the uninfected group. Meanwhile, significant differences were observed in the prevalence of lesions located in the gastric fornix or cardia (uninfected group: 67.3% vs. Hp group: 38.0%, p < 0.01), with an elevated morphology (80.0% vs. 56.0%, p < 0.01), with a subepithelial-like appearance (78.2% vs. 42.0%, p < 0.01), and with a color similar to that of the peripheral mucosa (43.6% vs. 25.0%, p = 0.02). The male-to-female ratio, lesion size, and presence or absence of vascular dilatation or black pigmentation on the surface were not different between the two groups. In the analysis comparing lesions with and without mucosal atrophy, the prevalence of multiple lesions was significantly higher (p = 0.02) in the atrophy group (5/25 patients, 20.0%) than in the non-atrophy group (7/141 patients, 5.0%). Conclusions The endoscopic features of oxyntic gland adenoma and gastric adenocarcinoma of the fundic gland type differ between patients with and without H. pylori infection.No potential conflict of interest relevant to this article was reported.Acta Medica Okayama2022インターフェロンbが骨芽細胞分化に及ぼす影響ENAsukoTanakaGraduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama UniversityNo potential conflict of interest relevant to this article was reported.MDPIActa Medica Okayama1010-660X5852022Long-Term Results of Posterior Vertebral Column Resection for Severe Thoracolumbar Kyphosis with Achondroplastic Patients: A Case Series605ENMasatoTanakaDepartment of Orthopaedic Surgery, Okayama University HospitalTsang-TungChanDepartment of Orthopaedic Surgery, Okayama University HospitalHaruoMisawaDepartment of Orthopaedic Surgery, Okayama University HospitalKojiUotaniDepartment of Orthopaedic Surgery, Okayama University HospitalShinayaAratakiDepartment of Orthopaedic Surgery, Okayama University HospitalTomoyukiTakigawaDepartment of Orthopaedic Surgery, Okayama University HospitalTetsuroMazakiDepartment of Orthopaedic Surgery, Okayama University HospitalYoshihisaSugimotoDepartment of Orthopaedic Surgery, Okayama University HospitalBackground and Objectives: Thoracolumbar kyphosis is one of the most frequent skeletal manifestations in patients with achondroplasia. Few papers have been published on the surgical treatment of this condition, especially in skeletally mature patients. With this study, we presented a retrospective case series of long-term surgical results for achondroplastic patients with severe thoracolumbar kyphosis. This study was conducted to evaluate the outcome of surgical treatment for thoracolumbar kyphosis in patients associated with achondroplasia presenting with paraparesis. Materials and Methods: Three patients with achondroplasia who developed neurologic deficits due to severe thoracolumbar kyphosis and underwent surgical treatment were evaluated (mean age 22.3 years; mean follow-up 9.3 years). All patients were treated with posterior vertebral column resection (p-VCR) of hypoplastic apical vertebrae with a cage and segmental instrumentation. Neurologic outcomes (JOA scores), correction of kyphosis, and operative complications were assessed. Results: All patients had back pain, neurological deficits, and urinary disturbance before surgery. The average preoperative JOA score was 8.3/11 points, which was improved to 10.7/11 points at the final follow-up (mean recovery rate 83%). All patients obtained neurologic improvement after surgery. The mean preoperative kyphotic angle was 117 degrees (range 103 degrees-126 degrees). The postoperative angles averaged 37 degrees (range 14 degrees-57 degrees), resulting in a mean correction rate of 67%. All patients had postoperative complications such as rod breakage and/or surgical site infection. Conclusions: The long-term results of p-VCR were acceptable for treating thoracolumbar kyphosis in patients with achondroplasia. To perform this p-VCR safely, spinal navigation and neuromonitoring are inevitable when resecting non anatomical fused vertebrae and ensuring correct pedicle screw insertion. However, surgical complications such as rod breakage and surgical site infection may occur at a high rate, making informed consent very important when surgery is indicated.No potential conflict of interest relevant to this article was reported.岡山大学理学部地球科学科Acta Medica Okayama1340-74142812022岡山市北部吉備高原地域に分布する古第三系・新第三系の分布・堆積相と古地理変遷125ENHajimeTanakaSeibu Engineering Consultants Co., Ltd.ShigeyukiSuzukiDepartment of Earth Sciences, Okayama University10.18926/ESR/63514No potential conflict of interest relevant to this article was reported.The Japanese Society of Internal MedicineActa Medica Okayama0918-29186182022Clinicopathological Characteristics of Superficial Barrett's Adenocarcinoma in a Japanese Population: A Retrospective, Multicenter Study11151123ENKentaHamadaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesHiromitsuKanzakiDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesKojiMiyaharaDepartment of Internal Medicine, Hiroshima City HospitalMasahiroNakagawaDepartment of Internal Medicine, Hiroshima City HospitalHirokazuMouriDepartment of Gastroenterology and Hepatology, Kurashiki Central HospitalMotowoMizunoDepartment of Gastroenterology and Hepatology, Kurashiki Central HospitalSakumaTakahashiDepartment of Gastroenterology, Kagawa Prefectural Central HospitalShinichiroHoriDepartment of Endoscopy, National Hospital Organization Shikoku Cancer CenterJunichiroNasuDepartment of Internal Medicine, Okayama Saiseikai General HospitalTakaoTsuzukiDepartment of Internal Medicine, Japanese Red Cross Society Himeji HospitalJiroMiyaikeDepartment of Internal Medicine, Saiseikai Imabari HospitalRyutaTakenakaDepartment of Internal Medicine, Tsuyama Chuo HospitalKenjiYamauchiDepartment of Gastroenterology, Mitoyo General HospitalSayoKobayashiDepartment of Internal Medicine, Fukuyama City HospitalTatsuyaToyokawaDepartment of Gastroenterology, National Hospital Organization Fukuyama Medical CenterMasafumiInoueDepartment of Gastroenterology, Japanese Red Cross Okayama HospitalMamoruNishimuraDepartment of Internal Medicine, Okayama City HospitalMinoruMatsubaraDepartment of Internal Medicine, Sumitomo Besshi HospitalJunTomodaDepartment of Internal Medicine, Akaiwa Medical Association HospitalYasushiYamasakiDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesTakehiroTanakaDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesYasuhiroShirakawaDepartment of Gastroenterological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesYoshiroKawaharaDepartment of Practical Gastrointestinal Endoscopy, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesToshiyoshiFujiwaraDepartment of Gastroenterological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesHiroyukiOkadaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesOkayama Gut Study GroupObjective Although Barrett's adenocarcinoma (BA) remains a minor disease in Japan, its incidence has been gradually increasing. We analyzed the characteristics of BA in Japanese populations. <br>
Methods We retrospectively reviewed medical records and analyzed the clinicopathological differences between short-segment Barrett's esophagus (SSBE) and long-segment Barrett's esophagus (LSBE), as well as metastasis. Local recurrence and metachronous lesions were analyzed only in patients who underwent endoscopic resection (ER). <br>
Patients Consecutive patients who had pathological T1 BAs resected by ER or surgery from January 2003 <br>
Results A total of 168 patients were analyzed, including 139 with SSBE and 29 with LSBE. In total, 67% of the SSBE lesions and 32% of the LSBE lesions were located between 0 and 3 o'clock (p=0.0014). No patients who achieved pathological margin-free resection (pR0) and 17% of patients who did not achieve pR0 experienced local recurrence (p=0.0131). None of the patients without lymphovascular involvement, a poorly differentiated component, lesion size of >30 mm, and submucosal invasion of >500 mu m experienced metastasis. The 5-year cumulative incidence rate of metachronous BA after ER was 0% in patients with SSBE and 40% in patients with LSBE (p=0.0005). <br>
Conclusion Superficial BA was likely to be detected at the right anterior wall of SSBE in the Japanese population. The risk for metachronous BA after ER was high in Japanese patients with LSBE, as in Western patients.No potential conflict of interest relevant to this article was reported.岡山大学大学院社会文化科学研究科Acta Medica Okayama1881-1671532022Forming Intercultural Friendships with Hosts: A Comparative Study of Serbians in Japan and Japanese in Serbia117ENMiraSIMIC-YAMASHITATomokoTanaka10.18926/63384No potential conflict of interest relevant to this article was reported.SAGE PublicationsActa Medica Okayama2324-7096102022COVID-19 mRNA Vaccine–Associated Uveitis Leading to Diagnosis of Sarcoidosis: Case Report and Review of Literature17ENToshihikoMatsuoGraduate School of Interdisciplinary Science and Engineering in Health Systems, Okayama University, JapanHiroyukiHondaDepartment of General Medicine, Okayama University Hospital, JapanTakehiroTanakaDepartment of Pathology, Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama University, JapanKensukeUraguchiDepartment of Otolaryngology, Head & Neck Surgery, Okayama University Hospital, JapanMasaakiKawaharaKawahara Eye Clinic, Okayama, JapanHideharuHagiyaDepartment of General Medicine, Okayama University Hospital, Japan<jats:p> A 34-year-old Japanese person with male gender identity who had been taking intramuscular injection of methyltestosterone depot for 11 years after bilateral mastectomy noticed blurred vision 5 days after the second vaccination for COVID-19 (Tozinameran; Pfizer-BioNTech) in the interval of 3 weeks following the first vaccination. The patient was diagnosed as granulomatous iritis with mutton-fat keratic precipitates and small iris nodules at the pupillary margin in the right eye and began to have 0.1% betamethasone eye drops with good response. The patient, however, continued to have fever and malaise and showed a high level of serum soluble interleukin-2 receptor (sIL-2R) even 4 weeks after the second vaccination. Computed tomographic scan disclosed mediastinal and bilateral hilar small lymphadenopathy together with limited granular lesion in the right lung. Gallium-67 scintigraphy demonstrated high uptake not only in mediastinal and hilar lymph nodes but also in bilateral parotid glands. Right parotid gland biopsy revealed noncaseating granulomas and proved pathological diagnosis of sarcoidosis. The systemic symptoms were relieved by oral prednisolone 20 mg daily. Even though the causal relationship remains undetermined, this case is unique at the point that vaccine-associated uveitis led to the detection of pulmonary lesions and lymphadenopathy, resulting in clinical and pathological diagnosis of sarcoidosis. In literature review, 3 patients showed sarcoidosis-like diseases after COVID-19 vaccination: 2 patients were diagnosed clinically as Lofgren syndrome with acute onset of erythema nodosum and ankle swelling, with or without mediastinal and hilar lymphadenopathy, whereas 1 patient with mediastinal lymphadenopathy but no uveitis was diagnosed pathologically by biopsy as sarcoidosis. </jats:p>No potential conflict of interest relevant to this article was reported.Public Library ScienceActa Medica Okayama1932-62031682021Clinical and phenotypical characteristics of submucosal invasive carcinoma in non-ampullary duodenal cancere0256797ENKatsunoriMatsuedaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesHiromitsuKanzakiDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesRyutaTakenakaDepartment of Internal Medicine, Tsuyama Chuo HospitalMasahiroNakagawaDepartment of Endoscopy, Hiroshima City Hiroshima Citizens HospitalKazuhiroMatsuedaDepartment of Gastroenterology and Hepatology, Kurashiki Central HospitalMasayaIwamuroDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesSeijiKawanoDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesYoshiroKawaharaDepartment of Practical Gastrointestinal Endoscopy, Okayama University HospitalTomohiroTojiDepartment of Diagnostic Pathology, Okayama University HospitalTakehiroTanakaDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesTakahitoYagiDepartment of Hepato-Biliary-Pancreatic Surgery, Okayama University HospitalToshiyoshiFujiwaraDepartment of Gastroenterological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesHiroyukiOkadaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesObjective The rare incidence of submucosal invasive non-ampullary duodenal carcinoma has led to scant information in literature; therefore, we compared the clinicopathological features between submucosal invasive carcinoma (SM-Ca), mucosal carcinoma (M-Ca), and advanced carcinoma (Ad-Ca). Materials We retrospectively analyzed 165 patients with sporadic non-ampullary duodenal carcinomas (SNADCs) from four institutions between January 2003 and December 2018. The SNADCs were divided to three groups according to histological diagnosis: SM-Ca, M-Ca, and Ad-Ca. The clinicopathological characteristics and mucin phenotypes were compared between groups. Results Among the 165 SNADCs, 11 (7%) were classified as SM-Ca, 70 (42%) as M-Ca, and 84 (51%) as Ad-Ca. We found that all SM-Ca (P = 0.013) and most Ad-Ca (P = 0.020) lesions were located on the oral-Vater; however, an almost equal distribution of M-Ca lesions was found between the oral- and anal-Vater. No significant difference was observed between the tumor diameter of M-Ca and SM-Ca; however, 45% (5/11) of SM-Ca were <= 10 mm. A total of 73% (8/11) of SM-Ca were classified as gastric phenotype and no lesions were classified as intestinal phenotype; whereas most M-Ca were classified as intestinal phenotype (67%, 8/12). Conclusions SM-Ca lesions were all located on the oral-Vater and were highly associated with the gastric mucin phenotype, which were different from the features of most M-Ca.No potential conflict of interest relevant to this article was reported.岡山医学会Acta Medica Okayama0030-155813332021十二指腸に濾胞性リンパ腫，リンパ濾胞過形成，リンパ管腫およびリンパ管拡張を合併した1 例175180ENMasayaIwamuroDepartment of Gastroenterology, Okayama University HospitalTakehiroTanakaDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesHiroyukiOkadaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences A 70-year-old Japanese man underwent esophagogastroduodenoscopy that revealed multiple whitish duodenal granules. The histopathological analysis of the biopsied specimen led to the diagnosis of duodenal-type follicular lymphoma. The lesion showed spontaneous improvement ; however, 14 months later a few small whitish granules were observed by esophagogastroduodenoscopy. Observation under magnification revealed slightly elevated opaque white spots and whitish granular protrusions of roughly the same size that were uniformly distributed in the duodenal bulb. The duodenal bulb lesions were histopathologically diagnosed as lymphoid hyperplasia. The patient also exhibited lymphangiectasia (which presented as scattered white spots) and lymphangioma (which presented as a soft submucosal tumor with white spots on the surface) in the second portion of the duodenum. This patient presented with four white lesions in the duodenum : duodenal-type follicular lymphoma, lymphoid hyperplasia, lymphangiectasia, and lymphangioma. Careful endoscopic evaluation enabled a prompt diagnosis in this case.No potential conflict of interest relevant to this article was reported.Sage Publications Inc.Acta Medica Okayama0394-6320362022Enriched CD45RA(-)CD62L(+) central memory T and decreased CD3(+)CD56(+) natural killer T lymphocyte subsets in the rectum of ulcerative colitis patients112ENMasayaIwamuroDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesTakahideTakahashiDivision of Medical Support, Okayama University HospitalNatsukiWatanabeDivision of Medical Support, Okayama University HospitalTakehiroTanakaDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesToshihiroInokuchiDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesSakikoHiraokaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesFumioOtsukaDepartment of General Medicine, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesHiroyukiOkadaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesObjectives To investigate the distinctive features of lymphocytes promoting inflammation in ulcerative colitis. Methods We performed flow cytometric analysis of peripheral blood mononuclear cells (PBMCs) and colorectal mucosa lymphocytes in ulcerative colitis patients (n = 13) and control patients (n = 5). Results CD62L(+)/CD3(+)CD4(+) (35.7 +/- 14.0% vs. 19.9 +/- 6.4%) and CD62L(+)/CD3(+)CD4(-) cells (17.1 +/- 17.4% vs. 2.4 +/- 3.9%) were higher in the rectum of ulcerative colitis patients than in control patients. Subpopulation analysis revealed that CD45RA(-)CD62L(+)/CD3(+)CD4(+), that is, central memory T cell fraction in CD4(+) T cells, was significantly increased in the rectum of ulcerative colitis, compared to that in control patients (23.3 +/- 10.5% vs. 8.2 +/- 4.0%). Comparison of rectum and colon samples in ulcerative colitis patients indicated that CD56(+)/CD3(+) was decreased in the rectum compared to that in the colon (11.3 +/- 12.5% vs. 21.3 +/- 16.5%). The ratio of CD56(+)/CD3(+) was also decreased in the rectum of active ulcerative colitis patients compared to that in ulcerative colitis patients at the endoscopic remission stages (2.8 +/- 1.7% vs. 18.5 +/- 13.3%). Conclusion We demonstrated that CD62L(+) T lymphocytes, particularly the CD45RA(-)CD62L(+) T cell subset that represents central memory T cells, were increased in the rectum of patients with ulcerative colitis. In addition, the CD56(+)/CD3(+) subset (natural killer T cells) was decreased in the rectum compared to that of less inflamed colonic mucosa. These results suggest that the enrichment of central memory T lymphocytes and the reduction of natural killer T cells in the gut mucosa are involved in the pathogenesis of ulcerative colitis.No potential conflict of interest relevant to this article was reported.岡山大学大学院社会文化科学研究科Acta Medica Okayama1881-1671522021コロナ禍への学生の否定肯定認識と気づきに関するテキストマイニングによる分析2939ENTomokoTanaka10.18926/63109No potential conflict of interest relevant to this article was reported.SAGE PublicationsActa Medica Okayama2324-7096102022Diffuse Large B-Cell Lymphoma 18 Years After Bilateral Lacrimal Gland IgG4-Related Disease: Case Report and Literature Review110ENToshihikoMatsuoOkayama University Graduate School of Interdisciplinary Science and Engineering in Health SystemsTakehiroTanakaDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesKenjiNotoharaDepartment of Pathology, Kurashiki Central HospitalKazuyaOkadaDepartment of Hematology/Oncology, Kurashiki Central HospitalIgG4-related disease is a recently established clinical entity. The disease might serve as the background for later development of systemic lymphoma. This study aims to confirm the diagnosis of IgG4-related disease by re-staining lacrimal gland lesions diagnosed previously with low-grade lymphoma in a patient who developed systemic diffuse large B-cell lymphoma (DLBCL) 18 years later. A 53-year-old man developed bilateral lacrimal gland swelling and right submandibular gland swelling and was diagnosed by excision as low-grade lymphoma. In follow-up, positron emission tomography showed high uptake in the median hyoid 11 years later but no malignancy was detected by laryngeal submucosal biopsy. He was well with no treatment until 18 years later when he had palatal swelling and was diagnosed with DLBCL by oral floor biopsy. He had systemic lymphadenopathy, infiltration in paranasal sinuses, hypopharynx, small intestine, kidney, and prostate. He underwent 8 courses of R-CHOP and 3 courses of high-dose methotrexate and achieved complete remission with no relapse for 1 year thereafter. Re-immunostaining of paraffin blocks of bilateral lacrimal gland lesions showed IgG and IgG4-positive lymphocytes and plasma cells among lymphoid follicles separated by fibrous bundles, with 10 or more IgG4-positive cells in high-power field. The IgG4/IgG-positive cell ratio was 100% and the number of κ chain-positive cells and λ chain-positive cells was the same. The bilateral lacrimal lesions were thus re-diagnosed as IgG4-related disease. In conclusion, systemic DLBCL occurred approximately 20 years after lacrimal gland IgG4-related disease. Literature review revealed 12 patients with IgG4-related disease, including the present patient, who later developed lymphoma in the other organs. No potential conflict of interest relevant to this article was reported.Baishideng Publishing Group IncActa Medica Okayama1007-932727412021Circulating tumor DNA dynamics analysis in a xenograft mouse model with esophageal squamous cell carcinoma71347143ENHiroyukiTerasawaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesHideakiKinugasaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesKazuhiroNousoDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesShumpeiYamamotoDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesMamiHiraiDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesTakehiroTanakaDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesAkinobuTakakiDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesHiroyukiOkadaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesBACKGROUND<br>
It remains unclear which factors, such as tumor volume and tumor invasion, influence circulating tumor DNA (ctDNA), and the origin of ctDNA in liquid biopsy is always problematic. To use liquid biopsies clinically, it will be very important to address these questions.<br>
AIM<br>
To assess the origin of ctDNA, clarify the dynamics of ctDNA levels, assess ctDNA levels by using a xenograft mouse after treatment, and to determine whether tumor volume and invasion are related to ctDNA levels.<br>
METHODS<br>
Tumor xenotransplants were established by inoculating BALB/c-nu/nu mice with the TE11 cell line. Groups of mice were injected with xenografts at two or four sites and sacrificed at the appropriate time point after xenotransplantation for ctDNA analysis. Analysis of ctDNA was performed by droplet digital PCR, using the human telomerase reverse transcriptase (hTERT) gene.<br>
RESULTS<br>
Mice given two-site xenografts were sacrificed for ctDNA at week 4 and week 8. No hTERT was detected at week 4, but it was detected at week 8. However, in four-site xenograft mice, hTERT was detected both at week 4 and week 6. These experiments revealed that both tumor invasion and tumor volume were associated with the detection of ctDNA. In resection experiments, hTERT was detected at resection, but had decreased by 6 h, and was no longer detected 1 and 3 d after resection.CONCLUSIONWe clarified the origin and dynamics of ctDNA, showing that tumor volume is an important factor. We also found that when the tumor was completely resected, ctDNA was absent after one or more days.No potential conflict of interest relevant to this article was reported.MDPI AGActa Medica Okayama2075-172911122021Bilateral Optic Disc Swelling as a Plausible Common Ocular Sign of Autoinflammatory Diseases: Report of Three Patients with Blau Syndrome or Cryopyrin-Associated Periodic Syndrome1433ENToshihikoMatsuoGraduate School of Interdisciplinary Science and Engineering in Health Systems, Okayama UniversityMasatoYashiroDepartment of Ophthalmology, Okayama University HospitalOsamuYamasakiMelanoma Center, Department of Dermatology, Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama UniversityTakehiroTanakaDepartment of Pathology, Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama UniversityAkiraMankiDepartment of Pediatrics, Okayama City HospitalThe aim of this study is to describe bilateral optic disc swelling in three consecutive patients with Blau syndrome or cryopyrin-associated periodic syndrome at a single institution. Case 1 was a 30-year-old woman receiving 25 mg etanercept twice weekly who had been diagnosed as early-onset sarcoidosis by biopsy of skin rashes at 5 months old and genetically diagnosed with Blau syndrome with CARD15/NOD2 mutation (N670K) at 13 years old. At 10 years old, she began to have uveitis with optic disc swelling in both eyes, resulting in macular degeneration and optic disc atrophy at 17 years old only when etanercept was introduced. Case 2 was a 21-year-old man receiving adalimumab every 2 weeks who had been diagnosed as early-onset sarcoidosis by biopsy of skin rashes at 1.5 years old and genetically diagnosed as Blau syndrome with CARD15/NOD2 mutation (C495Y) at 5 years old. At 8 years old, around the time of adalimumab introduction, he began to show bilateral optic disc swelling which continued until the age of 16 years when the dose of adalimumab was increased. Case 3 was a 20-year-old woman receiving canakinumab every 8 weeks for systemic symptoms such as fever, headache, vomiting, and abdominal pain and later for sensorineural hearing disturbance on both sides. She had been diagnosed genetically with cryopyrin-associated periodic syndrome with NLRP3 mutation (Y859C) at 7 years old. At 5 years old, she was found to have bilateral optic disc swelling, which continued until the age of 10 years when she began receiving canakinumab (IL-1β inhibitor). Bilateral optic disc swelling might be tentatively designated as a plausible common ocular feature, if it occurred, in autoinflammatory diseases to pay more attention to ophthalmic complications in rare diseases.No potential conflict of interest relevant to this article was reported.Lippincott Williams ＆ WilkinsActa Medica Okayama0025-7974100402021Scoring systems for differentiating gastrointestinal stromal tumors and schwannomas from leiomyomas in the stomache27520ENShotaroOkanoueDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesMasayaIwamuroDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesTakehiroTanakaDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesTakuyaSatomiDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesKentaHamadaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesHiroyukiSakaeDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesMakotoAbeDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesYoshiyasuKonoDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesHiromitsuKanzakiDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesSeijiKawanoDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesYoshiroKawaharaDepartment of Practical Gastrointestinal Endoscopy, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesHiroyukiOkadaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesThere is no practical predictive model for the diagnosis of gastrointestinal stromal tumors (GISTs). To establish a practical predictive model for the diagnosis of subepithelial lesions in the stomach, we reviewed patients with GISTs (n = 89), schwannomas (n = 7), and leiomyomas (n = 28). The tumor was more frequently found along the gastric cardia in the leiomyoma group (57.1%) than in the GIST/schwannoma group (2.1%, P < .01). Contrast enhancement (57.3% vs 0%, P < .01) and intra-tumoral necrosis (34.4% vs 0.0%, P < .01) were more frequently observed in the GIST/schwannoma group than in the leiomyoma group. On endoscopic ultrasonography, 58.3% of GISTs/schwannomas showed uneven echogenicity, whereas the echogenicity was uneven in 21.4% of leiomyomas (P < .01). There were no differences between the tumor color and the presence or absence of ulcer formation, tumor bleeding, irregularity of the tumor margin, cystic spaces, and hyperechoic spots between the 2 groups. Based on these results, we developed a 2-step diagnostic algorithm for GISTs/schwannomas. The first step comprises 1 endoscopic feature: a cardiac or non-cardiac location. Tumors with a cardiac location were judged as leiomyomas and those with a non-cardiac location were judged as GISTs/schwannomas, with 96.9% sensitivity and 57.1% specificity for GIST/schwannoma diagnosis. The second step comprises a combination of endoscopic (non-cardiac location), radiologic (positive contrast enhancement and intra-tumoral necrosis), and endosonographic (uneven echogenicity) features for a total of 4 points. We assigned 1 point to each feature. Tumors with scores of 2 to 4 were judged as GISTs/schwannomas, with 81.3% sensitivity and 92.9% specificity for GIST/schwannoma diagnosis. Our predictive model will be a practical guide for the management of gastric subepithelial lesions.No potential conflict of interest relevant to this article was reported.Spandidos PublicationsActa Medica Okayama2049-94501612021Proton beam therapy followed by pembrolizumab for giant ocular surface conjunctival malignant melanoma: A case report12ENToshihikoMatsuoRegenerative and Reconstructive Medicine (Ophthalmology), Okayama University Graduate School of Interdisciplinary Science and Engineering in Health SystemsOsamuYamasakiDepartment of Dermatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesTakehiroTanakaDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesKuniakiKatsuiDivision of Radiation Oncology, Department of Radiology, Kawasaki Medical SchoolTakahiroWakiDepartment of Radiology, Tsuyama Chuo HospitalThe present study describes proton beam therapy as a clinical option to achieve local control of giant conjunctival melanoma in an aged person, instead of orbital exenteration. An 80‑year‑old woman with one‑year history of left‑eye injection and hemorrhage experienced rapid growth of the ocular surface black mass. At the initial visit, a black, elastic hard, hemorrhage‑prone, thickened mass in the size of 30x40 mm with a presumed wide stalk covered the total area of the lid fissure on the left side. Biopsy of the mass demonstrated anomalous melanin‑containing cells in fibrin and hemorrhage, which were positive for cocktail‑mix antibodies against tyrosinase, melanoma antigen recognized by T cells‑1 and human melanoma black‑45, indicative of malignant melanoma. One month after the initial visit, the patient underwent proton beam therapy at the total dose of 70.4 Gy (relative biological effectiveness) in 32 fractions (~10 min each) in one and a half months. One month after the end of proton beam therapy, 3.5 months from the initial visit, the patient was found by computed tomographic scan to have multiple metastatic lesions in bilateral lung fields. With the evidence of absent BRAF mutation, the patient underwent intravenous administration of pembrolizumab 77.2 mg every three weeks five times in total. Then, three months after proton beam therapy, ocular surface melanoma almost subsided and the clear cornea allowed visualization of the intraocular lens inside the eye. In three weeks, spontaneous corneal perforation was plugged with iris incarceration. The patient died suddenly of unknown cause 7.5 months from the initial visit. The local control of giant conjunctival melanoma was achieved by proton beam therapy, leading to patient's satisfaction and better quality of life. Proton beam therapy, followed by immune checkpoint inhibitors, would become the future standard of care for unresectable giant conjunctival melanoma.No potential conflict of interest relevant to this article was reported.Lippincott Williams & WilkinsActa Medica Okayama2155-384X12112021The Impact of KRAS Mutation in Patients With Sporadic Nonampullary Duodenal Epithelial Tumorse00424ENHideakiKinugasaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesHiromitsuKanzakiDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesTakehiroTanakaDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesShumpeiYamamotoDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesYasushiYamasakiDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesKazuhiroNousoDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesKouichiIchimuraDepartment of Pathology, Hiroshima City Hiroshima Citizens HospitalMasahiroNakagawaDepartment of Endoscopy, Hiroshima City Hiroshima Citizens HospitalToshiharuMitsuhashiCenter for Innovative Clinical Medicine, OkayamaUniversity HospitalHiroyukiOkadaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesINTRODUCTION: The genomic characterization of primary nonampullary duodenal adenocarcinoma indicates a genetic resemblance to gastric and colorectal cancers. However, a correlation between the clinical and molecular characteristics of these cancers has not been established. This study aimed to elucidate the clinicopathological features of sporadic nonampullary duodenal epithelial tumors, including their molecular characteristics and prognostic factors. <br>
METHODS: One hundred forty-eight patients with sporadic nonampullary duodenal epithelial tumors were examined in this study. Patient sex, age, TNM stage, tumor location, treatment methods, histology, KRAS mutation, BRAF mutation, Fusobacterium nucleatum, mucin phenotype, and programmed death-ligand 1 (PD-L1) status were evaluated. KRAS and BRAF mutations, Fusobacterium nucleatum, mucin phenotype, and PD-L1 status were analyzed by direct sequencing, quantitative polymerase chain reaction, and immunochemical staining. <br>
RESULTS: The median follow-up duration was 119.4 months. There were no deaths from duodenal adenoma (the primary disease). Kaplan-Meier analysis for duodenal adenocarcinoma showed a significant effect of TNM stage (P < 0.01). In univariate analysis of primary deaths from duodenal adenocarcinoma, TNM stage II or higher, undifferentiated, KRAS mutations, gastric phenotype, intestinal phenotype, and PD-L1 status were significant factors. In multivariate analysis, TNM stage II or higher (hazard ratio: 1.63 x 10(10), 95% confidence interval: 18.66-6.69 x 10(36)) and KRAS mutation (hazard ratio: 3.49, confidence interval: 1.52-7.91) were significant factors. <br>
DISCUSSION: Only KRAS mutation was a significant prognostic factor in primary sporadic nonampullary duodenal adenocarcinoma in cases in which TNM stage was considered.No potential conflict of interest relevant to this article was reported.Springer natureActa Medica Okayama2509-9280412021Bone microarchitectural analysis using ultra-high-resolution CT in tiger vertebra and human tibia4ENRyotaInaiDepartment of Radiology, Okayama University Medical SchoolRyuichiNakaharaIntelligent Orthopaedic System Development, Okayama University Medical SchoolYusukeMorimitsuDevision of Radiology, Medical Support Department, Okayama University HospitalNoriakiAkagiDevision of Radiology, Medical Support Department, Okayama University HospitalYouheiMarukawaDepartment of Radiology, Okayama University Medical SchoolToshiMatsushitaDevision of Radiology, Medical Support Department, Okayama University HospitalTakashiTanakaDepartment of Radiology, Okayama University Medical SchoolAkihiroTadaDepartment of Radiology, Okayama University Medical SchoolTakaoHirakiDepartment of Radiology, Okayama University Medical SchoolYoshihisaNasuMedical materials for musculoskeletal reconstruction, Okayama University Medical SchoolKeiichiroNishidaOrthopaedic Surgery, Okayama University Medical SchoolToshifumiOzakiOrthopaedic Surgery, Okayama University Medical SchoolSusumuKanazawaDepartment of Radiology, Okayama University Medical SchoolBackground To reveal trends in bone microarchitectural parameters with increasing spatial resolution on ultra-high-resolution computed tomography (UHRCT) in vivo and to compare its performance with that of conventional-resolution CT (CRCT) and micro-CT ex vivo. Methods We retrospectively assessed 5 tiger vertebrae ex vivo and 16 human tibiae in vivo. Seven-pattern and four-pattern resolution imaging were performed on tiger vertebra using CRCT, UHRCT, and micro-CT, and on human tibiae using UHRCT. We measured six microarchitectural parameters: volumetric bone mineral density (vBMD), trabecular bone volume fraction (bone volume/total volume, BV/TV), trabecular thickness (Tb.Th), trabecular number (Tb.N), trabecular separation (Tb.Sp), and connectivity density (ConnD). Comparisons between different imaging resolutions were performed using Tukey or Dunnett T3 test. Results The vBMD, BV/TV, Tb.N, and ConnD parameters showed an increasing trend, while Tb.Sp showed a decreasing trend both ex vivo and in vivo. Ex vivo, UHRCT at the two highest resolutions (1024- and 2048-matrix imaging with 0.25-mm slice thickness) and CRCT showed significant differences (p <= 0.047) in vBMD (51.4 mg/cm(3) and 63.5 mg/cm(3)versus 20.8 mg/cm(3)), BV/TV (26.5% and 29.5% versus 13.8 %), Tb.N (1.3 l/mm and 1.48 l/mm versus 0.47 l/mm), and ConnD (0.52 l/mm(3) and 0.74 l/mm(3)versus 0.02 l/mm(3), respectively). In vivo, the 512- and 1024-matrix imaging with 0.25-mm slice thickness showed significant differences in Tb.N (0.38 l/mm versus 0.67 l/mm, respectively) and ConnD (0.06 l/mm(3)versus 0.22 l/mm(3), respectively). Conclusions We observed characteristic trends in microarchitectural parameters and demonstrated the potential utility of applying UHRCT for microarchitectural analysis.No potential conflict of interest relevant to this article was reported.Lippincott Williams & WilkinsActa Medica Okayama0025-7974100392021Clinical characteristics and course of sporadic non-ampullary duodenal adenomas A multicenter retrospective studye27382ENHiromitsuKanzakiDepartment of Gastroenterology and Hepatology, Okayama University HospitalKazuhiroMatsuedaDepartment of Gastroenterology and Hepatology, Kurashiki Central HospitalMasahiroNakagawaDepartment of Endoscopy, Hiroshima City Hiroshima Citizens HospitalTomokiInabaDepartment of Gastroenterology, Kagawa Prefectural Central HospitalMasahiroTakataniDepartment of Internal Medicine, Japanese Red Cross Society Himeji HospitalRyutaTakenakaDepartment of Internal Medicine, Tsuyama Chuo HospitalMasaoYoshiokaDepartment of Internal Medicine, Okayama Saiseikai General HospitalAtsushiImagawaDepartment of Gastroenterology, Mitoyo General HospitalMasafumiInoueDepartment of Gastroenterology, Japanese Red Cross Okayama HospitalSeiyuuSuzukiDepartment of Internal Medicine, Sumitomo Besshi HospitalJunTomodaDepartment of Internal Medicine, Akaiwa Medical Association HospitalMasayaIwamuroDepartment of Gastroenterology and Hepatology, Okayama University HospitalSeijiKawanoDepartment of Gastroenterology and Hepatology, Okayama University HospitalYoshiroKawaharaDepartment of Gastroenterology, Japanese Red Cross Okayama HospitalTakehiroTanakaDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesHiroyukiOkadaDepartment of Gastroenterology and Hepatology, Okayama University HospitalSporadic non-ampullary duodenal adenoma (SNADA) is a rare disease, and therefore, its clinical characteristics have not been comprehensively investigated. Furthermore, owing to the high complication rates and severity of endoscopic resection, treatment strategies vary among facilities. In the present study, we aimed to clarify the clinical characteristics and course of SNADA. We extracted clinical and histological records of SNADA cases diagnosed in 11 hospitals between September 1999 and August 2014. The patients were divided into "no-resection" and "resection" groups based on the initial treatment approach. We investigated the long-term outcome of the "no-resection" group and treatment results of the "resection" group, with particular interest in endoscopic resection. Overall, 299 patients were diagnosed with SNADA. The median age at diagnosis was 67 years (range, 31-88 years), with approximately twice as many men as women. The median tumor size was 8.0 mm (2-60 mm). In total, 161 patients were initially selected for no-resection and 138 underwent resection. Age >70 years and the presence of either severe illness or poor performance status were significantly related to opting for no-resection. In the no-resection group, 101 patients underwent endoscopic follow-up for at least 1 year. During the observational period (2.5 +/- 2.2 years), 27 lesions (27%) disappeared following cold forceps biopsy, and 13 lesions (14%) presented lateral growth. Four lesions (4%) changed to mucosal carcinoma, 3 were treated endoscopically, and 1 was surgically resected. Nineteen patients died; however, no one died of duodenal carcinoma. In the endoscopic resection group, en bloc resection was achieved in 78% of patients. However, the complication rate for perforation was 7%, and endoscopic submucosal dissection was associated with a 36% perforation rate. With the low incidence of cancer development and no disease specific death, the strategy of initially not performing resection could be considered especially for the older adults, poor-prognosis patients, or small lesions.No potential conflict of interest relevant to this article was reported.Elsevier Inc.Acta Medica Okayama187887501562021Comparative Study of Bilateral Dual Sacral-Alar-Iliac Screws versus Bilateral Single Sacral-Alar-Iliac Screw for Adult Spine Deformitiese300e306ENKojiUotaniDepartment of Orthopaedic surgery, Okayama Rosai HospitalMasatoTanakaDepartment of Orthopaedic surgery, Okayama Rosai HospitalSumeetSonawaneDepartment of Orthopaedic surgery, Okayama Rosai HospitalSameerRuparelDepartment of Orthopaedic surgery, Okayama Rosai HospitalYoshihiroFujiwaraDepartment of Orthopaedic surgery, Okayama Rosai HospitalShinyaAratakiDepartment of Orthopaedic surgery, Okayama Rosai HospitalTaroYamauchiDepartment of Orthopaedic surgery, Okayama Rosai HospitalHaruoMisawaDepartment of Orthopaedic surgery, Okayama University HospitalObjective<br>
To evaluate the feasibility of O-arm navigation of bilateral dual sacral-alar-iliac (SAI) screws compared with conventional bilateral single SAI and S1 pedicle screws for pelvic anchors in cases of adult spinal deformity. <br>
Methods<br>
This retrospective, comparative study included 39 patients who underwent corrective fusion using SAI screws from T10 to the pelvis. Patients were divided into 2 groups according to the number of SAI screws placed during adult spinal deformity surgery: single SAI screw (group S, 17 cases) and dual SAI screws (group D, 22 cases). The incidence of rod breakage, proximal junctional kyphosis, screw loosening, reoperation, and global alignment in each group was estimated. Postoperative patient-reported outcomes were measured using the Oswestry Disability Index, Japanese Orthopaedic Association Back Pain Evaluation Questionnaire, and visual analog scale. <br>
Results<br>
The incidence of SAI screw loosening was significantly lower in group D than in group S (23% vs. 65%, P = 0.011). The rod breakage incidence was 0% and 12% in groups D and S, respectively (P = 0.17). There were no significant differences in the postoperative global alignment and clinical outcomes between the 2 groups. <br>
Conclusions<br>
Dual SAI screws were associated with a significantly reduced incidence of screw loosening compared with single SAI screws. The bilateral dual SAI screws technique for pelvic anchors is feasible for the treatment of patients with adult spinal deformity.No potential conflict of interest relevant to this article was reported.Pharmaceutical Society of JapanActa Medica Okayama0031-690314152021Modeling and Analysis of Disease Microenvironments with 3D Cell Culture Technology647653ENHiroyoshiTanakaDepartment of Pharmaceutical Biomedicine, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama UniversityRemarkable progress in our ability to analyze diseased tissue has revolutionized our understanding of disease. From a simplistic understanding of abnormalities in bulk tissue, there is now increasing recognition that the heterogeneous and dynamically evolving disease microenvironment plays a crucial role in disease pathogenesis and progression as well as in the determination of therapeutic response. The disease microenvironment consists of multiple cell types as well as the various factors that these cells secrete. There is now immense interest in treatment strategies that target or modify the abnormal disease microenvironment, and a deeper understanding of the mechanisms that drive the formation, maintenance, and progression of the disease microenvironment is thus necessary. The advent of 3-dimensional (3D) cell culture technology has made possible the reconstitution of the disease microenvironment to a previously unimaginable extent in vitro. As an intermediate between traditional in vitro models based on 2-dimensional (2D) cell culture and in vivo models, 3D models of disease enable the in vitro reconstitution of complex interactions within the disease microenvironment which were unamenable in 2D while simultaneously allowing the mechanistic analysis of these interactions that would be difficult to perform in vivo. This symposium review aims to highlight the promise of using 3D cell culture technology to model and analyze the disease microenvironment using pancreatic cancer as an example.No potential conflict of interest relevant to this article was reported.The Japanese Society of Internal MedicineActa Medica Okayama0918-291860142021Squamous Metaplasia of the Stomach Associated with Lymphoma Infiltration22292234ENMasayaIwamuroDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesNobuharuFujiiDepartment of Hematology and Oncology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesTakehiroTanakaDepartment of Pathology, Okayama University HospitalHiromitsuKanzakiDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesSeijiKawanoDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesYoshiroKawaharaDepartment of Practical Gastrointestinal Endoscopy, Okayama University HospitalHiroyukiOkadaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesWe herein report a patient who presented with follicular lymphoma. Although the stomach was initially intact, mucosal redness and multiple erosions appeared in the gastric body owing to infiltration of the follicular lymphoma cells. Subsequently, a slightly depressed, white area lacking gastric mucosal structure was detected in the lesser curvature of the gastric cardia and body, where lymphoma cell infiltration was also pathologically observed beneath the stratified squamous epithelium. This case indicated that, although infrequent, prolonged mucosal injury owing to lymphoma infiltration can cause squamous metaplasia in the stomach.No potential conflict of interest relevant to this article was reported.Nature ResearchActa Medica Okayama2045-23221112021Leucine-rich alpha-2 glycoprotein as a marker of mucosal healing in inflammatory bowel disease11086ENErikoYasutomiDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesToshihiroInokuchiDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesSakikoHiraokaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesKensukeTakeiDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesShokoIgawaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesShumpeiYamamotoDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesMasayasuOhmoriDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesShoheiOkaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesYasushiYamasakiDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesHideakiKinugasaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesMasahiroTakaharaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesKeitaHaradaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesMasakiFurukawaDepartment of Laboratory Medicine, Okayama University HospitalKouichiItoshimaDepartment of Laboratory Medicine, Okayama University HospitalKenOkadaDepartment of Laboratory Medicine, Okayama University HospitalFumioOtsukaDepartment of Laboratory Medicine, Okayama University HospitalTakehiroTanakaDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesToshiharuMitsuhashiCenter for Innovative Clinical Medicine, Okayama University HospitalJunKatoDepartment of Gastroenterology, Graduate School of Medicine, Chiba UniversityHiroyukiOkadaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesLeucine-rich alpha-2 glycoprotein (LRG) may be a novel serum biomarker for patients with inflammatory bowel disease. The association of LRG with the endoscopic activity and predictability of mucosal healing (MH) was determined and compared with those of C-reactive protein (CRP) and fecal markers (fecal immunochemical test [FIT] and fecal calprotectin [Fcal]) in 166 ulcerative colitis (UC) and 56 Crohn's disease (CD) patients. In UC, LRG was correlated with the endoscopic activity and could predict MH, but the performance was not superior to that of fecal markers (areas under the curve [AUCs] for predicting MH: LRG: 0.61, CRP: 0.59, FIT: 0.75, and Fcal: 0.72). In CD, the performance of LRG was equivalent to that of CRP and Fcal (AUCs for predicting MH: LRG: 0.82, CRP: 0.82, FIT: 0.70, and Fcal: 0.88). LRG was able to discriminate patients with MH from those with endoscopic activity among UC and CD patients with normal CRP levels. LRG was associated with endoscopic activity and could predict MH in both UC and CD patients. It may be particularly useful in CD.No potential conflict of interest relevant to this article was reported.American Federation for Medical ResearchActa Medica Okayama2324-709682021Prostate Cancer Detected by Choroidal Tumor and Complete Response to Hormonal Therapy: Case Report and Literature Review of 24 Patients With Choroidal Metastasis From Prostate Cancer18ENToshihikoMatsuoOkayama University, Graduate School of Interdisciplinary Science and Engineering in Health SystemsTakehiroTanakaPathology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesAyaNakamuraUrology, Okayama Saiseikai General HospitalKoichiroWada5Urology, Okayama University HospitalMetastatic choroidal tumors derived from prostate cancer are rare. In this study, we report a patient who manifested a choroidal tumor as the initial presenting sign of prostate cancer and review 23 patients with choroidal metastasis of prostate cancer in the literature to answer a clinical question how the choroidal metastases would respond to hormonal therapy. A 73-year-old man presented with a choroidal tumor in the right eye. He was in good health and had no previous history except for current hemodialysis in 3 years due to chronic renal failure as a sequel to glomerulonephritis. With the diagnosis of a probable metastatic tumor, positron emission tomography was performed to disclose high-uptake sites in multiple bones, lymph nodes, and the prostate, together with multiple nodular lesions in bilateral lungs on computed tomography (CT) scan. Serum prostate-specific antigen (PSA) was elevated to 541 ng/mL, which supported prostate cancer as the primary site. He had degarelix injection, and the choroidal tumor resolved rapidly and became flat degeneration in a month. Prostate biopsy showed poorly differentiated adenocarcinoma, and he underwent surgical castration. He had no medication until 3 years later when he showed gradual increase of serum PSA up to 6.05 ng/mL and multiple bony metastases on CT scan. Bicalutamide, switched to enzalutamide and then to abiraterone, led to the undetectable level of serum PSA until the last visit with no relapse of the choroidal metastasis, 6.8 years after the initial visit. In the literature review of 24 patients with choroidal metastasis of prostate cancer, including this patient, 8 patients presented a choroidal tumor as the initial sign and the choroidal lesions mostly showed complete response to hormonal therapy. Among 13 patients who were frequently in the course of hormonal therapy, choroidal metastases showed complete or partial response to external beam radiation to the eye in 11 patients and episcleral plaque radiotherapy in 2 patients. In conclusion, metastatic choroidal tumors of prostate cancer would show good response to hormonal therapy when the therapy has not been initiated. Hormone-resistant choroidal metastases in the therapeutic course of prostate cancer could be managed successfully by external beam radiation to the eye.No potential conflict of interest relevant to this article was reported.Japanese Society of Internal MedicineActa Medica Okayama0918-291860112021Two Cases of Endometriosis in the Cecum Detected by Contrast-enhanced Computed Tomography with Air/Carbon Dioxide Insufflation16971701ENMasayaIwamuroDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and PharmaceuticalTakehiroTanakaDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesYuusakuSugiharaInternational Sugihara Eye-Medical Clinic, Japan and ４Department of Gastroenterological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesKeitaHaradaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesSakikoHiraokaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesYoshitakaKondoDepartment of Gastroenterological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesHiroyukiOkadaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesWe herein report two patients with endometriosis in the cecum. Both patients presented with a protruding, subepithelial tumor on colonoscopy and were diagnosed with cecal endometriosis after surgical resection. It is notable that the cecal lesions were not initially identified on computed tomography (CT), while CT colonography with air/carbon dioxide insufflation resulted in the detection of the cecal tumor. These cases highlight the possibility of false-negative results on conventional CT in patients with cecal endometriosis. We consider CT colonography with air/carbon dioxide insufflation useful for detecting cecal tumors in such cases.No potential conflict of interest relevant to this article was reported.SpringerActa Medica Okayama2198-7793712021Long-term survival without recurrence after surgery for gastric yolk sac tumor-like carcinoma: a case report111ENHibikiUmedaDepartment of Gastroenterological Surgery, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesSatoruKikuchiDepartment of Gastroenterological Surgery, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesShinjiKurodaDepartment of Gastroenterological Surgery, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesShuyaYanoDepartment of Gastroenterological Surgery, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesTakehiroTanakaDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesKazuhiroNomaDepartment of Gastroenterological Surgery, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesMasahikoNishizakiDepartment of Gastroenterological Surgery, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesShunsukeKagawaDepartment of Gastroenterological Surgery, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesYuzoUmedaDepartment of Gastroenterological Surgery, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesToshiyoshiFujiwaraDepartment of Gastroenterological Surgery, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesBackground Gastric yolk sac tumor (YST)-like carcinoma is extremely rare, and its prognosis is poor, because most patients have widespread metastases at the time of diagnosis. We report a case of gastric YST-like carcinoma with an adenocarcinoma component without metastases in which curative resection was performed. Case presentation A 77-year-old man complaining of melena and dizziness due to anemia was diagnosed with poorly differentiated adenocarcinoma in the gastric cardia, with a benign ulcer in the gastric body. He underwent total gastrectomy with D2 lymph node dissection for the tumor. Histological examination of the resected specimens revealed a mixture of reticular and glandular neoplastic components morphologically. In the reticular area, an endodermal sinus pattern and some Schiller-Duval bodies were confirmed. Gastric YST-like carcinoma with adenocarcinoma components, T2N0M0 Stage IB, was diagnosed. Immunohistochemical analysis showed that the YST was positive for carcinoembryonic antigen (CEA), alpha-fetoprotein (AFP) and p53. In contrast, the adenocarcinoma was positive for p53 and negative for CEA and AFP. The patient remained healthy as of 7 years postoperatively, with no recurrence. Conclusions Routine medical examinations or endoscopic examinations for accidental symptom may be helpful for early diagnosis and good prognosis for gastric YST-like carcinoma, although the prognosis is generally poor.No potential conflict of interest relevant to this article was reported.Japanese Society of Internal MedicineActa Medica Okayama0918-29186072021Risk Factors for Gastric Cancer after the Eradication of Helicobacter pylori Evaluated Based on the Background Gastric Mucosa: A Propensity Score-matched Case-control Study969976ENYukaObayashiDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesSeijiKawanoDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesHiroyukiSakaeDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesMakotoAbeDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesYoshiyasuKonoDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesHiromitsuKanzakiDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesMasayaIwamuroDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesYoshiroKawaharaDepartment of Practical Gastrointestinal Endoscopy, Okayama University HospitalTakehiroTanakaDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesHiroyukiYanaiDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesHiroyukiOkadaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesObjective<br> The eradication of Helicobacter pylori (H. pylori) reduces the risk for gastric cancer (GC) development, but it cannot prevent GC completely. We investigated the risk factors of early GC development after the eradication of H. pylori, based on the histological characteristics of gastric mucosa. <br><br>
Methods<br> Sixty-one patients who underwent endoscopic submucosal dissection for early GC after successful H. pylori eradication (Group A) and 122 patients without developing a gastric neoplasm over 3 years after successful H. pylori eradication (Group B) were analyzed. We compared the histological findings of the patients enrolled in Group A and Group B before and after the propensity score-matching.<br><br>
Results<br> Comparing the characteristics of two the groups, Group A consisted predominantly of males, had significantly more elderly patients, and the years after successful eradication tended to be longer. We performed score matching for these three factors to reduce the influence of any confounding factors. After matching, the scores of inflammation for Group A (n=54) was significantly higher than those of Group B (n =54) at the greater curvature of the antrum, the lesser curvature of the corpus, and the greater curvature of the corpus. According to a multivariate analysis, inflammation of the greater curvature of the antrum and lesser curvature of the corpus were found to be independent risk factors. The risk ratio and 95% CI were 5.92 (2.11-16.6) (p<0.01), and 3.56 (1.05-13.2) (p=0.04), respectively.<br><br>
Conclusion<br>A continuous high level of inflammation of the background gastric mucosa may he a risk factor for gastric cancer onset after H. pylori eradication.No potential conflict of interest relevant to this article was reported.Elsevier BVActa Medica Okayama1424-39032132021Endoscopic ultrasonography findings of pancreatic parenchyma for predicting subtypes of intraductal papillary mucinous neoplasms622629ENYukiFujiiDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical ScienceKazuyukiMatsumotoDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical ScienceHironariKatoDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical ScienceTatsuhiroYamazakiDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical ScienceTakeshiTomodaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical ScienceShigeruHoriguchiDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical ScienceKoichiroTsutsumiDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical ScienceKenjiNishidaDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical ScienceTakehiroTanakaDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical ScienceKeijiHanadaDepartment of Gastroenterology, JA Onomichi General HospitalHiroyukiOkadaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical ScienceBackground and Aims:<br>
The subtypes of intraductal papillary mucinous neoplasms (IPMNs) are closely associated with the clinicopathological behavior and recurrence after surgical resection. However, there are no established non-invasive methods to confirm the subtypes of IPMNs without surgery. The aim of this study is to predict the subtypes of IPMNs using the findings of endoscopic ultrasonography (EUS). <br>
<br>
Methods:<br>
Sixty-two consecutive patients with IPMNs who underwent EUS before surgery were retrospectively reviewed. The following EUS findings were analyzed and their relationship with the subtypes was evaluated: diameter of the main pancreatic duct, cyst size, number of cysts, height of mural nodule, early chronic pancreatitis (CP) finding, fatty parenchyma and atrophic parenchyma.<br>
<br>
Results:<br>
The subtypes of IPMNs were as follows: gastric (G)-type 38 (61%), intestinal (I) -type 14 (23%) and pancreatobiliary (PB) -type 10 (16%). Fatty parenchyma was significantly associated with G-type (P < 0.0001). Early CP findings ≥ 2 and atrophic parenchyma were significantly correlated with I-type (P < 0.0001). PB-type was significantly associated with pancreatic parenchyma without early CP findings or fatty degeneration in comparison to the other subtypes (P < 0.0001). Using the above characteristic EUS findings, the sensitivity, specificity, and accuracy were as follows: 63%, 92% and 74%, respectively, in G-type, 57%, 96% and 87% in I-type, and 90%, 94% and 94% in PB-type.<br>
<br>
Conclusions:<br>
The evaluation of EUS findings, especially focused on the pancreatic parenchyma, has the potential to predict the subtypes of IPMN.No potential conflict of interest relevant to this article was reported.岡山大学理学部地球科学教室Acta Medica Okayama1340-74142712021新・古第三系の分布に着目した岡山県中西部における 吉備高原地域の地形特性1927ENHajime TanakaFukken Co., Ltd., Okayama branch officeShigeyukiSuzukiGraduate School of Natural Science and Technology, Okayama University10.18926/ESR/61955The Kibi Plateau Surface is associated with the Paleogene gravel river bed deposits of the Kibi Group and the Miocene marine deposits of the Katsuta Group and the Bihoku Group. These Paleogene and Miocene units are valley fill deposits. The Kibi Group is composed of formations which is deposited by more than 7 different depositional events during earliest to latest Paleogene Period. Repeated cycles of “erosion - formation of new valley system - deposition and fill up the valley” created the low relief topographic surface. The deposition of
the Miocene deposits might complete the Kibi Plateau Surface. Detailed field works have done in middle western part of Okayama Prefecture. The Kibi Plateau Surface in study area is gently dipping from NW (about 600m high) to SE (about 100m high). The distributions of the Paleogene and Miocene deposits fit the surface.
At the southern margin of the Kibi Plateau, the surface is a little inclined (from 400m high to 100m high) where the bottom of paleo-valleys of the Paleogene deposits are subparallel to the surface. It suggests that the gentle tilting of the Kibi Plateau is caused by an up-warping.No potential conflict of interest relevant to this article was reported.S. Karger AGActa Medica Okayama0012-28231022021Gastric Adenoma: A High Incidence Rate of Developing Carcinoma and Risk of Metachronous Gastric Cancer according to Long-Term Follow-Up878886ENYukiOkamotoDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesHiromitsuKanzakiDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesTakehiroTanakaDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesHiroyukiSakaeDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesMakotoAbeDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesMasayaIwamuroDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesSeijiKawanoDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesYoshiroKawaharaDepartment of Practical Gastrointestinal Endoscopy, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesHiroyukiOkadaepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesIntroduction:<br>
Gastric adenomas are histologically defined as benign epithelial tumors. While some of them remain adenomas for a long time, others progress to carcinomas. However, long-term outcomes of such cases are not entirely clear. Here, we explored the risk factors and incidence of developing carcinoma from gastric adenoma as well as metachronous gastric cancer.<br>
Methods:<br>
This study was conducted at a facility that adopted a follow-up strategy for gastric adenoma. Lesions histologically diagnosed as gastric intestinal-type adenomas between January 2004 and December 2016 were analyzed. Clinicopathological data were collected from patients’ medical records, and histological changes from adenoma to carcinoma during endoscopic follow-up and risk factors of cancer development were evaluated.<br>
Results:<br>
This study involved 409 lesions from 376 patients. The analysis of the development of gastric cancer from adenoma and metachronous gastric cancer was ultimately performed for 282 lesions from 258 patients and 269 lesions from 246 patients, respectively, due to different follow-up periods. The 5-year rate of carcinoma development was 34.0%. Risk factors for carcinoma development upon multivariate analysis were lesion size ≥15 mm and morphological depression. All cases with both factors developed gastric carcinoma, and 50.5% of those with either factor developed carcinoma within 5 years. Gastric adenoma was accompanied by metachronous gastric cancer in 1.5% of the patients annually. The only risk factor for metachronous gastric carcinoma was primary adenoma progressing to carcinoma during the follow-up period.<br>
Discussion/Conclusion:<br>
Given the high rate of carcinoma development in patients with risk factors, resection of gastric adenoma should be considered during the initial examination. Careful observation and follow-up should also be conducted to detect not only changes in the primary adenoma but also the occurrence of metachronous carcinoma, especially in cases of adenoma progressing to carcinoma. No potential conflict of interest relevant to this article was reported.Nature ResearchActa Medica Okayama2045-23221112021Endoscopic resection is a suitable initial treatment strategy for oxyntic gland adenoma or gastric adenocarcinoma of the fundic gland typeENMasayaIwamuroDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesChiakiKusumotoDepartment of Gastroenterology, Nippon Kokan Fukuyama HospitalMasahiroNakagawaDepartment of Internal Medicine, Hiroshima City HospitalSayoKobayashiDepartment of Internal Medicine, Fukuyama City HospitalMasaoYoshiokaDepartment of Internal Medicine, Okayama Saiseikai General HospitalTomokiInabaDepartment of Gastroenterology, Kagawa Prefectural Central HospitalTatsuyaToyokawaDepartment of Gastroenterology, Fukuyama Medical CenterShinichiroHoriDepartment of Endoscopy, National Hospital Organization Shikoku Cancer CenterShouichiTanakaDepartment of Gastroenterology, Iwakuni Clinical CenterKazuhiroMatsuedaDepartment of Gastroenterology and Hepatology, Kurashiki Central HospitalTakehiroTanakaDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesHiroyukiOkadaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesThe aim of this study was to reveal the histological features of oxyntic gland adenomas and gastric adenocarcinoma of the fundic-gland type (GA-FG). We retrospectively examined the histological features of 126 lesions of oxyntic gland adenoma and/or GA-FG in 116 patients. The prevalence of oxyntic gland adenomas and GA-FG was approximately equal. The majority of the lesions were resected by endoscopic mucosal resection using a diathermic snare (EMR, n=42) or endoscopic submucosal dissection (ESD, n=72). Histologically, there were no lesions with invasion at the level of the muscularis propria or deeper, and lymphovascular invasion was present in 1.6%. Of the ESD and EMR specimens, there were no lesions that were positive for vertical margins. Among the eight GA-FG patients with deep (>= 500 mu m) submucosal invasion, six were treated with endoscopic resection alone, and no recurrence was documented. No patients died of the disease during the median follow-up period of 14.5 months. In conclusion, all lesions were confined to the mucosa or submucosa and were negative for vertical margins. Lymphovascular invasion was present in only 1.6% of the patients. Thus, we believe that endoscopic resection is a suitable initial treatment method for oxyntic gland adenoma and GA-FG.No potential conflict of interest relevant to this article was reported.Okayama University Medical SchoolActa Medica Okayama0386-300X7522021Long-term Survival with a Rare Advanced Primary Gastrointestinal Malignant Melanoma Treated with Laparoscopic Surgery/Immune Checkpoint Inhibitor231238ENMotochikaEndoDepartment of Gastroenterological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesShuyaYanoDepartment of Gastroenterological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesHiroakiAsanoDepartment of Surgery, Mitoyo general HospitalShoTakedaDepartment of Gastroenterological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesYukiHamadaDepartment of Gastroenterological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesYoshitakaKondoDepartment of Gastroenterological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesShinjiKurodaDepartment of Gastroenterological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesKunitoshiShigeyasuDepartment of Gastroenterological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesSatoruKikuchiDepartment of Gastroenterological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesTakehiroTanakaDepartment of Pathology, Okayama University HospitalFuminoriTeraishiDepartment of Gastroenterological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesMasahikoNishizakiDepartment of Gastroenterological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesShunsukeKagawaDepartment of Gastroenterological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesToshiyoshiFujiwaraDepartment of Gastroenterological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesCase Report10.18926/AMO/61906Targeted therapies for malignant melanoma have improved patients’ prognoses. A primary gastrointestinal malignant melanoma is very rare, with no standard treatment strategy. We treated a 78-year-old Japanese female with advanced primary gastrointestinal melanoma of the descending colon and gallbladder. We administered a multidisciplinary treatment: surgical resection of the descending colon and gallbladder tumors, resection of the metastatic lymph nodes behind the pancreas head, and immune checkpoint antibody-blockade therapy (nivolumab) for ~4 years. PET/CT demonstrated no recurrent lesion for > 3 years. Multidisciplinary therapies (e.g., surgery, chemotherapy, radiotherapy, target therapy, and immune checkpoint antibody-blockade therapy) can successfully treat primary gastrointestinal malignant melanoma.No potential conflict of interest relevant to this article was reported.Baishideng Publishing Group Inc.Acta Medica Okayama1007-932727112021Efficacy and safety of endoscopic submucosal dissection for gastric tube cancer: A multicenter retrospective study10431054ENTakuyaSatomiDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesSeijiKawanoDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesTomokiInabaDepartment of Gastroenterology, Kagawa Prefectural Central HospitalMasahiroNakagawaDepartment of Endoscopy, Hiroshima City Hiroshima Citizens HospitalHirokazuMouriDepartment of Gastroenterology and Hepatology, Kurashiki Central HospitalMasaoYoshiokaDepartment of Gastroenterology and Hepatology, Okayama Saiseikai General HospitalShoichiTanakaDepartment of Gastroenterology, National Hospital Organization Iwakuni Clinical CenterTatsuyaToyokawaDepartment of Gastroenterology, National Hospital Organization Fukuyama Medical CenterSayoKobayashiDepartment of Internal Medicine, Fukuyama City HospitalTakehiroTanakaDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesHiromitsuKanzakiDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesMasayaIwamuroDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesYoshiroKawaharaDepartment of Practical Gastrointestinal Endoscopy, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesHiroyukiOkadaGraduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama UniversityBACKGROUND Recent improvements in the prognosis of patients with esophageal cancer have led to the increased occurrence of gastric tube cancer (GTC) in the reconstructed gastric tube. However, there are few reports on the treatment results of endoscopic submucosal dissection (ESD) for GTC. AIM To evaluate the efficacy and safety of ESD for GTC after esophagectomy in a multicenter trial. METHODS We retrospectively investigated 48 GTC lesions in 38 consecutive patients with GTC in the reconstructed gastric tube after esophagectomy who had undergone ESD between January 2005 and December 2019 at 8 institutions participating in the Okayama Gut Study group. The clinical indications of ESD for early gastric cancer were similarly applied for GTC after esophagectomy. ESD specimens were evaluated in 2-mm slices according to the Japanese Classification of Gastric Carcinoma with curability assessments divided into curative and non-curative resection based on the Gastric Cancer Treatment Guidelines. Patient characteristics, treatment results, clinical course, and treatment outcomes were analyzed. RESULTS The median age of patients was 71.5 years (range, 57-84years), and there were 34 men and 4 women. The median observation period after ESD was 884 d (range, 8-4040 d). The median procedure time was 81 min (range, 29-334 min), the en bloc resection rate was 91.7% (44/48), and the curative resection rate was 79% (38/48). Complications during ESD were seen in 4% (2/48) of case, and those after ESD were seen in 10% (5/48) of case. The survival rate at 5 years was 59.5%. During the observation period after ESD, 10 patients died of other diseases. Although there were differences in the procedure time between institutions, a multivariate analysis showed that tumor size was the only factor associated with prolonged procedure time. CONCLUSION ESD for GTC after esophagectomy was shown to be safe and effective.No potential conflict of interest relevant to this article was reported.Springer Science and Business Media LLCActa Medica Okayama1867-1071392021Imaging evaluation of hereditary renal tumors: a pictorial review619632ENTakashiTanakaDepartment of Radiology, Okayama University HospitalAkiraKawashimaDepartment of Radiology, Mayo ClinicYoheiMarukawaDepartment of Radiology, Okayama University HospitalTakahiroKitayamaDepartment of Radiology, Okayama University HospitalYoshihisaMasaokaDepartment of Radiology, Okayama University HospitalKatsuhideKojimaDepartment of Radiology, Okayama University HospitalToshihiroIguchiDepartment of Radiology, Okayama University HospitalTakaoHirakiDepartment of Radiology, Okayama University HospitalSusumuKanazawaDepartment of Radiology, Okayama University Hospital More than 10 hereditary renal tumor syndromes (HRTSs) and related germline mutations have been reported with HRTS-associated renal and extrarenal manifestations with benign and malignant tumors. Radiologists play an important role in detecting solitary or multiple renal masses with or without extrarenal findings on imaging and may raise the possibility of an inherited predisposition to renal cell carcinoma, providing direction for further screening, intervention and surveillance of the patients and their close family members before the development of potentially lethal renal and extrarenal tumors. Renal cell carcinomas (RCCs) associated with von Hippel–Lindau disease are typically slow growing while RCCs associated with HRTSs, such as hereditary leiomyomatosis and renal cell carcinoma syndrome, are highly aggressive. Therefore, radiologists need to be familiar with clinical and imaging findings of renal and extrarenal manifestations of HRTSs. This article reviews clinical and imaging findings for the evaluation of patients with well-established HRTSs from a radiologist’s perspective to facilitate the clinical decision-making process for patient management.No potential conflict of interest relevant to this article was reported.HINDAWI LTDActa Medica Okayama2090-652820212021A Case of Myoepithelial Hamartoma: Morphological Variation Supported by OCT4 Expression6617370ENTakehiroTanakaDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesKenjiNishidaDepartment of Pathology, Okayama University HospitalMasayaIwamuroDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesSatoruKikuchiDepartment of Gastroenterological Surgery, Okayama University, Graduate School of Medicine, Dentistry, and Pharmaceutical ScienceTadashiYoshinoDepartment of Pathology, Okayama University, Graduate School of Medicine, Dentistry, and Pharmaceutical ScienceIn this report, we describe a patient with myoepithelial hamartoma, which is regarded as synonymous with adenomyosis and heterotopic pancreas. Endoscopy revealed a submucosal tumor in the antrum of the stomach. Subsequently, distal gastrectomy with Roux-en-Y reconstruction was performed. Histological findings of adenomyomatous lesion and heterotopic pancreatic tissue were observed in this lesion. The distribution of OCT4, which is a pluripotency marker, varied in each part.No potential conflict of interest relevant to this article was reported.AIP PublishingActa Medica Okayama0021-960615492021Formation of hot ice caused by carbon nanobrushes. II. Dependency on the radius of nanotubes094502ENMasakazuMatsumotoResearch Institute for Interdisciplinary Science, Okayama UniversityTakumaYagasakiDivision of Chemical Engineering, Graduate School of Engineering Science, Osaka UniversityHidekiTanakaResearch Institute for Interdisciplinary Science, Okayama UniversityStable crystalline structures of confined water can be different from bulk ice. In Paper I [T. Yagasaki et al., J. Chem. Phys. 151, 064702 (2019)] of this study, it was shown, using molecular dynamics (MD) simulations, that a zeolite-like ice structure forms in nanobrushes consisting of (6,6) carbon nanotubes (CNTs) when the CNTs are located in a triangle arrangement. The melting temperature of the zeolite-like ice structure is much higher than the melting temperature of ice Ih when the distance between the surfaces of CNTs is ∼0.94 nm, which is the best spacing for the bilayer structure of water. In this paper, we perform MD simulations of nanobrushes of CNTs that are different from (6,6) CNTs in radius. Several new porous ice structures form spontaneously in the MD simulations. A stable porous ice forms when the radius of its cavities matches the radius of the CNTs well. All cylindrical porous ice structures found in this study can be decomposed into a small number of structural blocks. We provide a new protocol to classify cylindrical porous ice crystals on the basis of this decomposition.No potential conflict of interest relevant to this article was reported.Japanese Society for Lymphoreticular Tissue ResearchActa Medica Okayama1346-42806112021Follow-up with serum IgG4-monitoring in 8 patients with IgG4-related disease diagnosed by a lacrimal gland mass1020ENToshihikoMatsuoOkayama University Graduate School of Interdisciplinary Science and Engineering in Health SystemsTakehiroTanakaDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesYasuharuSatoDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesHitomiKataokaDepartment of General Medicine, Okayama University HospitalMayuUkaDepartment of Radiology, Okayama University HospitalDaisukeEnnishiDepartment of Hematology/Oncology, Okayama University HospitalTomofumiYanoDepartment of Internal Medicine, Okayama Rosai HospitalThe diagnostic criteria for IgG4-related disease were previously published and serum IgG4 measurement has been reimbursed by national health insurance in Japan since 2012. Eight patients diagnosed with IgG4-related disease based on lacrimal gland masses were retrospectively reviewed. The 8 patients were 3 men and 5 women ranging in age from 52 to 77 (median, 63) years at the initial visit and their follow-up period ranged from 0.25 to 11 (median, 7) years. Bilateral and unilateral involvement were noted in 4 patients each; 2 on the right side and 2 on the left side in those with unilateral involvement. Serum IgG4 was high in 5 of 8 patients at the initial visit. Five patients with no systemic signs were followed without treatment, whereas oral steroids were administered and tapered in the other 3 patients who exhibited systemic signs. One patient with a history of radiation for MALT lymphoma in bilateral lacrimal glands developed IgG4-related disease in the left lacrimal gland 10 years later and was followed without treatment. Nine years later, her serum IgG4 level increased to 1500 mg/dL and paracardiac lesions, found on positron emission tomography, were confirmed to be MALT lymphoma by needle biopsy, leading to systemic chemotherapy. The other 7 patients had neither local recurrence nor additional systemic signs. Serum IgG4 monitoring may be useful to detect systemic complications in IgG4-related ophthalmic disease and markedly high serum IgG4 levels may indicate new lymphoma at other sites.No potential conflict of interest relevant to this article was reported.Japanese Society for Lymphoreticular Tissue ResearchActa Medica Okayama1346-42806042020Differential diagnosis of chronic lymphocytic leukemia/small lymphocytic lymphoma and other indolent lymphomas, including mantle cell lymphoma124129ENTadashiYoshinoDepartment of Pathology, Okayama University Graduate SchoolTakehiroTanakaDepartment of Pathology, Okayama University Graduate SchoolYasuharuSatoDepartment of Pathology, Okayama University Graduate SchoolChronic lymphocytic leukemia/small lymphocytic lymphoma (CLL/SLL) accounts for approximately 1% of all lymphomas in our department. In this article, we describe the differential diagnosis of CLL/SLL from other indolent lymphomas, with special reference to follicular lymphoma, marginal zone B-cell lymphoma, lymphoplasmacytic lymphoma, and mantle cell lymphoma, although the latter is considered to be aggressive. CLL/SLL often exhibits proliferation centers, similar to follicular lymphoma. Immunohistological examination can easily distinguish these two lymphomas. The most important characteristic of CLL/SLL is CD5 and CD23 positivity. Mantle cell lymphoma is also CD5-positive and there are some CD23-positive cases. Such cases should be carefully distinguished from CLL/SLL. Some marginal zone lymphomas are also positive for CD5 and such cases are often disseminated. Lymphoplasmacytic lymphoma should also be a differential diagnosis for CLL/SLL. It frequently demonstrates MYD88 L265P, which is a key differential finding. By immunohistological examination, the expression of lymphoid enhancer-binding factor 1 is specific for CLL/SLL and can be a good marker in the differential diagnosis.No potential conflict of interest relevant to this article was reported.岡山大学教育学部国語研究会Acta Medica Okayama2189-5414352021附属小・中学校における校長講話の記録3039ENNo potential conflict of interest relevant to this article was reported.岡山大学大学院教育学研究科Acta Medica Okayama1883-24231762021保育者の長期的なアイデンティティの変化と 自伝的記憶との関係3746ENOsamuNISHIYAMADivision of Developmental Studies and Support, Graduate School of Education, Okayama UniversityMikaWAKADAManiwa City Hokubo Centers for Early Childhood Education and CareOsanoriTANAKAFaculty of Education, Shujitsu University10.18926/bgeou/61465This study stands on long-term longitudinal research of 12 years from the training stage to the initial and middle terms. The study traced the changes in childcare worker identities and clarified the relationship between long-term changes in childcare worker identities and autobiographical memories. To be more specific, the study continuously applied the Multidimensional Ego Identity Scale (Tani, 2001a) to the training school graduation period, the initial term, and the transition from initial form to mid-career. Also, the study looked back on the past from the mid-career period. The childcare worker was subsequently asked for descriptions of childcare episodes as autobiographical memories. As a result, it turned out that there were four patterns of changes in the identities of childcare workers: “descending group,” “ascending group,” “low sustaining group,” and “high sustaining group.” These change patterns appeared to match the descriptions of the corresponding autobiographical memories. The study sorted out each group using extracted keywords and the like.No potential conflict of interest relevant to this article was reported.IOP PublishingActa Medica Okayama2632-3338132020On the Occurrence of Clathrate Hydrates in Extreme Conditions: Dissociation Pressures and Occupancies at Cryogenic Temperatures with Application to Planetary Systems80ENHidekiTanakaResearch Institute for Interdisciplinary Science, Okayama UniversityTakumaYagasakiResearch Institute for Interdisciplinary Science, Okayama UniversityMasakazuMatsumotoResearch Institute for Interdisciplinary Science, Okayama UniversityWe investigate the thermodynamic stability of clathrate hydrates at cryogenic temperatures from the 0 K limit to 200 K in a wide range of pressures, covering the thermodynamic conditions of interstellar space and the surface of the hydrosphere in satellites. Our evaluation of the phase behaviors is performed by setting up quantum partition functions with variable pressures on the basis of a rigorous statistical mechanics theory that requires only the intermolecular interactions as input. Noble gases, hydrocarbons, nitrogen, and oxygen are chosen as the guest species, which are key components of the volatiles in such satellites. We explore the hydrate/water two-phase boundary of those clathrate hydrates in water-rich conditions and the hydrate/guest two-phase boundary in guest-rich conditions, either of which occurs on the surface or subsurface of icy satellites. The obtained phase diagrams indicate that clathrate hydrates can be in equilibrium with either water or the guest species over a wide range far distant from the three-phase coexistence condition and that the stable pressure zone of each clathrate hydrate expands significantly on intense cooling. The implication of our findings for the stable form of water in Titan is that water on the surface exists only as clathrate hydrate with the atmosphere down to a shallow region of the crust, but clathrate hydrate in the remaining part of the crust can coexist with water ice. This is in sharp contrast to the surfaces of Europa and Ganymede, where the thin oxygen air coexists exclusively with pure ice.No potential conflict of interest relevant to this article was reported.Spandidos PublicationsActa Medica Okayama1792-09811942020Observer agreement for the diagnosis of intestinal acute graft‑vs.‑host disease based on the presence of villous atrophy in the terminal ileum30763080ENYuusakuSugiharaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesSakikoHiraokaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesErikoYasutomiDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesShoheiOkaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesYasushiYamasakiDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesToshihiroInokuchiDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesHideakiKinugasaDivision of Endoscopy, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesMasahiroTakaharaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesYukiMoritoDepartment of Gastroenterology and Hepatology, Hiroshima City Hiroshima Citizens HospitalSakumaTakahashiDepartment of Gastroenterology and Hepatology, Kagawa Prefectural Central HospitalKeitaHaradaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesTakehiroTanakaDepartment of Diagnostic Pathology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesFumioOtsukaDepartment of General Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesHiroyukiOkadaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesIntestinal graft‑vs.‑host disease (GVHD) is a serious complication of allo‑hematopoietic stem cell transplantation (allo‑HSCT). Villous atrophy in the terminal ileum is considered a useful diagnostic indicator for GVHD. However, the inter‑ and intra‑observer agreement regarding the ileocolonoscopic findings indicative of acute intestinal GVHD, i.e., villous atrophy in the terminal ileum, are currently insufficient in multiple institutions. Thus, the present study aimed to investigate the incidence of villous atrophy in the terminal ileum to diagnose acute intestinal GVHD and determine the inter‑ and intra‑observer agreement regarding this result for experienced endoscopists from multiple institutions. Consecutive patients who underwent allo‑HSCT were referred to our institution between May 2008 and September 2015. A total of 54 patients underwent total ileocolonoscopy after allo‑HSCT due to suspected intestinal acute GVHD. Subsequently, three observers from different institutions evaluated the cases for the presence of villous atrophy in the terminal ileum. In this study, the pathology results were a gold standard to evaluate the predictive value of ileocolonoscopy detection. Definitive pathological and non‑pathological GVHD was diagnosed in 22 and 32 cases, respectively. The results of examining whether villous atrophy could predict GVHD were as follows. For three observers (A, B and C), the sensitivity of villous atrophy in the terminal ileum was 86.4, 77.3 and 79.2%, respectively, whereas the specificity was 62.5, 62.5 and 86.7%, respectively. The positive predictive value (PPV) and negative predictive value (NPV) of villous atrophy for GVHD were as follows: The PPV of appearance was 61.3, 58.6 and 82.6%, respectively, whereas the NPV was 87.0, 80.0 and 83.9%, respectively. Kappa coefficients for the inter‑observer reliability were 0.85, 0.63 and 0.63 for observers A and B, A and C, and B and C, respectively. The intra‑observer kappa coefficient was 0.88 for observer A, 0.73 for observer B and 0.75 for observer C. A substantial observer agreement was achieved for the analysis of villous atrophy in the terminal ileum and the agreement for the predictive histological diagnosis was also excellent. Based on the results of the present study, identification of villous atrophy in the terminal ileum was a clinically effective diagnostic parameter, even if different endoscopists were involved in the diagnosis at multiple institutions. The present study was registered as a trial with the University Hospital Medical Information Network (UMIN; registration no. UMIN000025390).No potential conflict of interest relevant to this article was reported.Mary Ann LiebertActa Medica Okayama1531-10742072020The Albedo of Ryugu: Evidence for a High Organic Abundance, as Inferred from the Hayabusa2 Touchdown Maneuver916921ENChristianPotiszilPheasant Memorial Laboratory for Geochemistry and Cosmochemistry, Institute for Planetary Materials, Okayama UniversityRyojiTanakaThe Pheasant Memorial Laboratory for Geochemistry and Cosmochemistry, Institute for Planetary Materials, Okayama UniversityKatsuraKobayashiThe Pheasant Memorial Laboratory for Geochemistry and Cosmochemistry, Institute for Planetary Materials, Okayama UniversityTakKunihiroThe Pheasant Memorial Laboratory for Geochemistry and Cosmochemistry, Institute for Planetary Materials, Okayama UniversityEizoNakamuraThe Pheasant Memorial Laboratory for Geochemistry and Cosmochemistry, Institute for Planetary Materials, Okayama UniversityThe Hayabusa2 mission successfully collected samples from the asteroid Ryugu last year and will return these to Earth in December 2020. It is anticipated that the samples will enable the analysis of terrestrially uncontaminated organic matter and minerals. Such analyses are in turn expected to elucidate the evolution of organic matter through Solar System history, including the origination and processing of biogenically important molecules, which could have been utilized by the first organisms on Earth. In anticipation, studies have made predictions concerning the properties of Ryugu, including its composition. The spectral characteristics of Ryugu, such as albedo, have been employed to relate the asteroid to members of the carbonaceous chondrite group that have been identified on Earth. However, the recent Hayabusa2 touchdown highlights a disparity between the color of surfaces of displaced platy fragments, indicating a brightening trend for the surface exposed to space compared to that facing into the body. Here we present a mass balance calculation with reference to data from the literature, which indicates that Ryugu may contain a significantly higher abundance of organic matter (likely >50%) than the currently most accepted meteorite analogues. A high organic content may result in high levels of extractable organic matter for the second touchdown site, where the spacecraft sampled freshly exposed material. However, high abundances of insoluble aromatic/graphitic rich organic matter may be present in the first touchdown site, which sampled the surface of Ryugu that had been exposed to space. Moreover, we suggest that the potentially high organic abundance and the rubble-pile nature of Ryugu may originate from the capture of rocky debris by a comet nucleus and subsequent water-organic-mineral interactions and sublimation of water ice.No potential conflict of interest relevant to this article was reported.Baishideng Publishing GroupActa Medica Okayama1007-932726132020Review of the diagnosis of gastrointestinal lanthanum deposition14391449ENMasayaIwamuroDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesHaruoUrataCentral Research Laboratory, Okayama University Medical SchoolTakehiroTanakaDepartment of Pathology, Okayama University HospitalHiroyukiOkadaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesLanthanum carbonate is used for treatment of hyperphosphatemia mostly in patients with chronic renal failure. Although lanthanum carbonate is safe, recently, lanthanum deposition in the gastrointestinal mucosa of patients has been reported in the literature. This review provides an overview of gastroduodenal lanthanum deposition and focuses on disease’s endoscopic, radiological, and histological features, prevalence, and outcome, by reviewing relevant clinical studies, case reports, and basic research findings, to better understand the endoscopic manifestation of gastrointestinal lanthanum deposition. The possible relationship between gastric lanthanum deposition pattern and gastric mucosal atrophy is also illustrated; in patients without gastric mucosal atrophy, gastric lanthanum deposition appears as diffuse white lesions in the posterior wall and lesser curvature of the gastric body. In the gastric mucosa with atrophy, lanthanum-related lesions likely appear as annular or granular whitish lesions. Moreover, these white lesions are probably more frequently observed in the lower part of the stomach, where intestinal metaplasia begins.No potential conflict of interest relevant to this article was reported.The Japanese Society of Internal MedicineActa Medica Okayama0918-29185942020Cytomegalovirus Colitis Followed by Colonic Pseudolipomatosis and Gastric Emphysema in a Post-resuscitation Patient519525ENMasayaIwamuroDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesTakehiroTanakaDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesNaoYamauchiCenter for Graduate Medical Education, Okayama University HospitalYuriNakashimaDepartment of Nephrology, Rheumatology, Endocrinology, and Metabolism, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesTakahiraWadaDepartment of Nephrology, Rheumatology, Endocrinology, and Metabolism, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesSakikoHiraokaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesYoshiroKawaharaDepartment of Practical Gastrointestinal Endoscopy, Okayama University HospitalHiroyukiOkadaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesA 64-year-old Japanese man suffered cardiopulmonary arrest, which may have resulted from sepsis and/or hyperosmolar hyperglycemic non-ketonic coma, and was admitted after successful resuscitation. He had watery diarrhea on day 18 and was diagnosed with cytomegalovirus enterocolitis. In addition, computed tomography performed on day 27 and colonoscopy revealed gastric emphysema and intestinal pseudolipomatosis, respectively. This report is the first to describe a patient with cytomegalovirus enterocolitis and subsequent gastric emphysema and pseudolipomatosis. Gastrointestinal cytomegalovirus infection may underlie gastric emphysema and intestinal pseudolipomatosis, particularly in patients with relative or obvious immune dysfunction. No potential conflict of interest relevant to this article was reported.The Japanese Society of Internal MedicineActa Medica Okayama0918-291859232020Four Cases of Desquamative Esophagitis Occurring after Hematopoietic Stem Cell Transplantation30153022ENMasayaIwamuroDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesDaisukeEnnishiDepartment of Hematology and Oncology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesKen-ichiMatsuokaDepartment of Hematology and Oncology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesTakehiroTanakaDepartment of Pathology, Okayama University HospitalShotaroOkanoueDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesYukaObayashiDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesHiroyukiSakaeDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesYoshiroKawaharaDepartment of Practical Gastrointestinal Endoscopy, Okayama University HospitalHiroyukiOkada Department of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesWe herein report four patients with desquamative esophagitis that developed one to nine days after peripheral blood stem cell transplantation (PBSCT). Three patients underwent allogeneic PBSCT for leukemia, and the other underwent autologous PBSCT for pineoblastoma. Esophagogastroduodenoscopy revealed mucosal sloughing and fresh blood in the esophagus. Fasting and intravenous proton pump inhibitor therapy in addition to blood transfusion improved the esophageal lesions within five to seven days in three patients. These cases indicate that desquamative esophagitis can occur in patients who receive hematopoietic stem cell transplantation. Although blood transfusions may be required, it can be resolved within seven days. No potential conflict of interest relevant to this article was reported.BMCActa Medica Okayama1471-24072012020Liquid biopsy for patients with IBD-associated neoplasia1188ENHideakiKinugasaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesSakikoHiraokaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesKazuhiroNousoDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesShumpeiYamamotoDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesMamiHiraiDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesHiroyukiTerasawaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesErikoYasutomiDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesShoheiOkaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesMasayasuOhmoriDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesYasushiYamasakiDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesToshihiroInokuchiDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesMasahiroTakaharaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesKeitaHaradaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesTakehiroTanakaDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesHiroyukiOkadaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesBackground</br>
It is often difficult to diagnose inflammatory bowel disease (IBD)-associated neoplasia endoscopically due to background inflammation. In addition, due to the absence of sensitive tumor biomarkers, countermeasures against IBD-associated neoplasia are crucial. The purpose of this study is to develop a new diagnostic method through the application of liquid biopsy.</br>
Methods</br>
Ten patients with IBD-associated cancers and high-grade dysplasia (HGD) with preserved tumor tissue and blood were included. Tumor and non-tumor tissues were analyzed for 48 cancer-related genes using next-generation sequencing. Simultaneously, circulating tumor DNA (ctDNA) was analyzed for mutations in the target genes using digital PCR.</br>
Results</br>
Out of 10 patients, seven had IBD-related cancer and three had IBD-related HGD. Two patients had carcinoma in situ; moreover, three had stageII and two had stage III. To avoid false positives, the mutation rate cutoff was set at 5% based on the control results; seven of 10 (70%) tumor tissue samples were mutation-positive. Mutation frequencies for each gene were as follows: TP53 (20.9%; R136H), TP53 (25.0%; C110W), TP53 (8.5%; H140Q), TP53 (31.1%; R150W), TP53 (12.8%; R141H), KRAS (40.0%; G12V), and PIK3CA (34.1%; R 88Q). The same mutations were detected in the blood of these seven patients. However, no mutations were detected in the blood of the remaining three patients with no tumor tissue mutations. The concordance rate between tumor tissue DNA and blood ctDNA was 100%.</br>
Conclusion</br>
Blood liquid biopsy has the potential to be a new method for non-invasive diagnosis of IBD-associated neoplasia.No potential conflict of interest relevant to this article was reported.IOP PressActa Medica Okayama1387-28777312020A New Serum Biomarker Set to Detect Mild Cognitive Impairment and Alzheimer’s Disease by Peptidome Technology 217227ENKojiAbeDepartment of Neurology, Okayama UniversityJingweiShangDepartment of Neurology, Okayama UniversityXiaowenShiDepartment of Neurology, Okayama UniversityToruYamashitaDepartment of Neurology, Okayama UniversityNozomiHishikawaDepartment of Neurology, Okayama UniversityMamiTakemotoDepartment of Neurology, Okayama UniversityRyutaMoriharaDepartment of Neurology, Okayama UniversityYumikoNakanoDepartment of Neurology, Okayama UniversityYasuyukiOhtaDepartment of Neurology, Okayama UniversityKentaroDeguchiDepartment of Neurology, Okayama City Hospital, OkayamaMasakiIkedaDepartment of Neurology, Gunma University, Graduate School of MedicineYoshioIkedaDepartment of Neurology, Gunma University, Graduate School of MedicineKoichiOkamotoDepartment of Neurology, Geriatrics Research Institute and HospitalMikioShojiDepartment of Neurology, Geriatrics Research Institute and HospitalMasamitsuTakatamaDepartment of Neurology, Geriatrics Research Institute and HospitalMotohisaKojoDepartment of Neurology, Ako Chuo HospitalTakeshiKurodaDivision of Neurology, Department of Medicine, Showa University, School of MedicineKenjiroOnoDivision of Neurology, Department of Medicine, Showa University, School of MedicineNoriyukiKimuraDepartment of Neurology, Faculty of Medicine, Oita UniversityEtsuroMatsubaraDepartment of Neurology, Faculty of Medicine, Oita UniversityYosukeOsakadaDepartment of Neurology, Kurashiki Heisei HospitalYosukeWakutaniDepartment of Neurology, Kurashiki Heisei HospitalYoshikiTakaoDepartment of Neurology, Kurashiki Heisei HospitalYasutoHigashiDepartment of Neurology, Himeji Central HospitalKyoichiAsadaMembrane Protein and Ligand Analysis Center, Protosera Inc.,TakehitoSengaMembrane Protein and Ligand Analysis Center, Protosera Inc.,Lyang-Ja LeeMembrane Protein and Ligand Analysis Center, Protosera Inc.,KenjiTanakaMembrane Protein and Ligand Analysis Center, Protosera Inc.,Background:</br>
Because dementia is an emerging problem in the world, biochemical markers of cerebrospinal fluid (CSF) and radio-isotopic analyses are helpful for diagnosing Alzheimer’s disease (AD). Although blood sample is more feasible and plausible than CSF or radiological biomarkers for screening potential AD, measurements of serum amyloid- β (Aβ), plasma tau, and serum antibodies for Aβ1 - 42 are not yet well established.</br>
Objective:</br>
We aimed to identify a new serum biomarker to detect mild cognitive impairment (MCI) and AD in comparison to cognitively healthy control by a new peptidome technology.</br>
Methods:</br>
With only 1.5μl of serum, we examined a new target plate “BLOTCHIP®” plus a matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF/MS) to discriminate control (n = 100), MCI (n = 60), and AD (n = 99). In some subjects, cognitive Mini-Mental State Examination (MMSE) were compared to positron emission tomography (PET) with Pittsburgh compound B (PiB) and the serum probability of dementia (SPD). The mother proteins of candidate serum peptides were examined in autopsied AD brains.</br>
Results:</br>
Apart from Aβ or tau, the present study discovered a new diagnostic 4-peptides-set biomarker for discriminating control, MCI, and AD with 87% of sensitivity and 65% of specificity between control and AD (***p < 0.001). MMSE score was well correlated to brain Aβ deposition and to SPD of AD. The mother proteins of the four peptides were upregulated for coagulation, complement, and plasticity (three proteins), and was downregulated for anti-inflammation (one protein) in AD brains.</br>
Conclusion:</br>
The present serum biomarker set provides a new, rapid, non-invasive, highly quantitative and low-cost clinical application for dementia screening, and also suggests an alternative pathomechanism of AD for neuroinflammation and neurovascular unit damage.No potential conflict of interest relevant to this article was reported.ElsevierActa Medica Okayama2215-016172020Technique for single-step lymphocyte isolation from an endoscopic biopsy specimen for the diagnosis of gastrointestinal lymphoma101095ENMasayaIwamuroDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesTakahideTakahashiDivision of Medical Support, Okayama University HospitalNatsukiWatanabeDivision of Medical Support, Okayama University HospitalSizumaOmoteDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesKatsunoriMatsuedaDepartment of Gastrointestinal Oncology, Osaka International Cancer InstituteTakehiroTanakaDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesDaisukeEnnishiDepartment of Hematology and Oncology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesFumioOtsukaDepartment of General Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesTadashiYoshinoDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesHiroyukiOkadaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesIn this paper, we introduce a simplified, one-step procedure for lymphocyte isolation from an endoscopically biopsied fragment. For lymphocyte isolation, an endoscopically harvested specimen and 5 mL of normal saline solution were placed in a wire mesh strainer set in a porcelain bowl. To obtain the lymphocyte suspension, the solid specimen was crushed using the rubber portion of a plunger of a 10 mL injection syringe. Flow cytometry was performed using the lymphocyte suspension. For validating our methods, the one-step lymphocyte isolation technique was used to perform flow cytometry on samples from 23 patients with (n = 12) or without (n = 11) gastrointestinal lymphoma. Flow cytometry of light chain expression was performed in all patient samples (feasibility: 100%). Sensitivity was 83.3% (10/12) and specificity was 100% (11/11). In conclusion, lymphocytes isolated from a single endoscopic biopsy specimen using our simplified and quick procedure are suitable for flow cytometry. Considering that flow cytometry has an important advantage of providing the results on the examination day itself, the results of this study suggest that flow cytometric analysis using our single-step lymphocyte isolation technique can be potentially used to diagnose lymphoma in the gastrointestinal mucosa.No potential conflict of interest relevant to this article was reported.Acta Medica Okayama2020河岸浸食を含む河床変動解析の高度化のための最適計算格子サイズと動的計算格子の適用に関する研究ENGraduate School of Environmental and Life Science, Okayama UniversityNo potential conflict of interest relevant to this article was reported.HindawiActa Medica Okayama2090-652820202020Appendiceal Orifice Inflammation in Ulcerative Colitis Mimicking Mucosa-Associated Lymphoid Tissue Lymphoma in the Cecum8893604ENMasayaIwamuroDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesTakahideTakahashiDivision of Medical Support, Okayama University HospitalTakehiroTanakaDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesTomohiroTojiDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesSakikoHiraokaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesSeijiKawanoDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesYoshiroKawaharaDepartment of Practical Gastrointestinal Endoscopy, Okayama University HospitalHiroyukiOkadaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesA 55-year-old Japanese woman, who had been diagnosed with ulcerative colitis at 18 years of age, underwent screening endoscopy examinations. Esophagogastroduodenoscopy revealed an extranodal marginal zone lymphoma of mucosa-associated lymphoid tissue (MALT lymphoma) of the stomach. Colonoscopy showed a slightly elevated reddish lesion with dilated microvessels but no erosions or ulcers. Although MALT lymphoma in the cecum was endoscopically suspected, flow cytometry and pathological analyses led to the diagnosis of appendiceal orifice inflammation in ulcerative colitis. This case highlights the diversity of the endoscopic appearance of appendiceal orifice inflammation in ulcerative colitis.No potential conflict of interest relevant to this article was reported.BMCActa Medica Okayama1471-230X2012020The efficacy of pancreatic juice cytology with liquid-based cytology for evaluating malignancy in patients with intraductal papillary mucinous neoplasm319ENKazuyaMiyamotoDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical ScienceKazuyukiMatsumotoDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical ScienceHironariKatoDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical ScienceRyuichiYoshidaDepartment of Gastroenterological Surgery, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical ScienceYuzoUmedaDepartment of Gastroenterological Surgery, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical ScienceHirohumiInoueDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical ScienceTakehiroTanakaDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical ScienceAkihiroMatsumiDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical ScienceYosukeSaragaiDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical ScienceYukiFujiiDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical ScienceTatsuhiroYamazakiDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical ScienceDaisukeUchidaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical ScienceTakeshiTomodaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical ScienceShigeruHoriguchiDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical ScienceTakahitoYagiDepartment of Gastroenterological Surgery, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical ScienceHiroyukiOkadaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical ScienceBackground</br>
Pancreatic juice cytology (PJC) is a tool for diagnosing malignant intraductal papillary mucinous neoplasm (IPMN); however, the accuracy is insufficient using the conventional method. Liquid-based cytology (LBC) improves the cell recovery rate, and almost all cells can be evaluated. We evaluated the efficacy of PJC with LBC for malignant IPMN.</br>
Methods</br>
We retrospectively analyzed 90 patients with suspected malignant IPMN who underwent PJC before pancreatectomy. PJC with smear and LBC methods was conducted in 52 patients (between June 2003 to December 2011) and 38 patients (between January 2012 to December 2018). Based on the imaging studies, all of the patients were classified according to the international consensus guidelines for IPMN revised in 2017.</br>
Results</br>
Of the 90 patients, 43 (48%) had malignant IPMN (high-grade dysplasia or invasive carcinoma), and the remaining patients had non-malignant IPMN (intermediate- or low-grade dysplasia). LBC increased the accuracy of PJC for the diagnosis of malignant IPMN (smear method: 56% [29/52] vs. LBC method: 76% [29/38]; P = 0.044). In a multivariate analysis, LBC was a significant factor influencing the accurate diagnosis of PJC (odds ratio: 3.52; P = 0.021). Furthermore, LBC increased the accuracy of PJC for malignant IPMN in patients with worrisome features (smear method: 66% [19/29] vs. LBC method: 93% [14/15]; P = 0.043).</br>
Conclusions</br>
LBC increases the accuracy of PJC for diagnosing malignant IPMN compared with the conventional smear method.No potential conflict of interest relevant to this article was reported.SAGE PublicationsActa Medica Okayama2324-709682020Pathologically Proven Intraocular Infiltration With Adult T-Cell Leukemia/Lymphoma: Two New Cases With Either Vitreous Opacity or Aqueous Hypopyon and Literature Review of 16 Cases2324709620966843ENToshihikoMatsuoOkayama University Graduate School of Interdisciplinary Science and Engineering in Health SystemsTakehiroShimizuOphthalmology, Okayama University HospitalTakehiroTanakaPathology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesAkiraYamamotoHematology/Oncology, Okayama Unversity HospitalHirokiTakasukaHematology/Oncology, Okayama Unversity HospitalThis study reported 2 new patients and 16 historical cases with pathologically proven intraocular infiltration with adult T-cell leukemia and lymphoma (ATLL) to know the timing of intraocular infiltration in the disease course. The first case was a 67-year-old woman who developed bilateral vitreous opacity about half a year after the onset of acute type of ATLL that had been unresponsive to chemotherapy. She underwent vitrectomy combined with cataract surgery in both eyes. She had bilateral optic disc atrophy and localized retinal white infiltrates in both eyes. Cytological examination of vitreous aspirates demonstrated medium-sized cells with aberrant flower-like convoluted nuclei, positive for CD3, and thus indicative of T-cells. The second case was a 38-year-old man who was diagnosed acute type of ATLL at the presentation of acute kidney injury. About half a year after initial chemotherapy and allogeneic hematopoietic stem cell transplantation, he developed aqueous hypopyon in the right eye, concurrent with cutaneous and central nervous system relapse. Aqueous tap disclosed class V abnormal cells. The aqueous “pseudohypopyon” resolved in response to another round of chemotherapy with mogamulizumab. In review of 18 patients, intraocular infiltration with ATLL was diagnosed by vitrectomy in 9, aqueous tap in 3, chorioretinal biopsy in 3, and autopsy in 3. The intraocular infiltration developed concurrently with systemic diagnosis of ATLL in 5 patients, but developed later after chemotherapy in 13. In conclusion, intraocular infiltration with ATLL appears rare, and pathological diagnosis by vitrectomy and aqueous tap would help determine therapeutic plan in relapse after chemotherapy.No potential conflict of interest relevant to this article was reported.MDPIActa Medica Okayama2073-4409982020Ligation of MHC Class II Induces PKC-Dependent Clathrin-Mediated Endocytosis of MHC Class II1810ENKentoMasakiDepartment of Immunobiology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesYuhjiHirakiDepartment of Immunobiology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesHirokaOnishiDepartment of Immunobiology, Faculty of Pharmacy and Pharmaceutical Sciences, Okayama UniversityYukaSatohDepartment of Immunobiology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesPaul A.RocheExperimental Immunology Branch, National Cancer Institute, National Institutes of HealthSatoshiTanakaDepartment of Pharmacology, Division of Pathological Sciences, Kyoto Pharmaceutical UniversityKazuyukiFurutaDepartment of Immunobiology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesIn addition to antigen presentation to CD4(+)T cells, aggregation of cell surface major histocompatibility complex class II (MHC-II) molecules induces signal transduction in antigen presenting cells that regulate cellular functions. We previously reported that crosslinking of MHC-II induced the endocytosis of MHC-II, which was associated with decreased surface expression levels in murine dendritic cells (DCs) and resulted in impaired activation of CD4(+)T cells. However, the downstream signal that induces MHC-II endocytosis remains to be elucidated. In this study, we found that the crosslinking of MHC-II induced intracellular Ca(2+)mobilization, which was necessary for crosslinking-induced MHC-II endocytosis. We also found that these events were suppressed by inhibitors of Syk and phospholipase C (PLC). Treatments with a phorbol ester promoted MHC-II endocytosis, whereas inhibitors of protein kinase C (PKC) suppressed crosslinking-induced endocytosis of MHC-II. These results suggest that PKC could be involved in this process. Furthermore, crosslinking-induced MHC-II endocytosis was suppressed by inhibitors of clathrin-dependent endocytosis. Our results indicate that the crosslinking of MHC-II could stimulate Ca(2+)mobilization and induce the clathrin-dependent endocytosis of MHC-II in murine DCs.No potential conflict of interest relevant to this article was reported.日本学生支援機構Acta Medica Okayama0916-13091012019海外留学から帰国した日本人学生を対象とする帰国後異文化間教育プログラムの開発-帰国後のケアとキャリア形成を目的とした自助グループ活動実践の試み-4663ENAiTakahamaProject Researcher, Interfaculty Initiative in Information Studies, The University of TokyoTomokoTanakaGraduate School of Humanities and Social Sciences, Okayama UniversityNo potential conflict of interest relevant to this article was reported.日本学生支援機構Acta Medica Okayama0916-13091002019ムスリム留学生との交流のために−調査・実践から見えてきた日本的共同性の視点−3243ENSachikoNakanoInternational Students Center, Yamaguchi UniversityTomokoTanakaGraduate School of Humanities and Social Science, Okayama UniversityNo potential conflict of interest relevant to this article was reported.International Academic ForumActa Medica Okayama2187-0616612019A Mechanism Linking Discrimination, Conflict, and Switching Behaviour in Bicultural Individuals2940ENTomokoTanakaOkayama UniversityJungHuiLeeKanagawa Dental UniversityThis study focuses on the switching behaviour exhibited by Zainichi Koreans (ethnic Koreans living in Japan who have effectively managed to maintain their Korean nationality and have
been granted the status of tokubetsu eijusha [“special” permanent residents] by the Japanese government). In the present article, the term “switching” refers to the alteration of behaviour according to different cultural contexts. This study aimed to identify the mechanism underlying links between perceived discrimination, internal conflict, and switching. A questionnaire survey was conducted with 184 Zainichi Koreans. Path analyses showed that discrimination had a significant effect on conflict (β = .31, p < .001), and that conflict enhanced switching significantly (β = .25, p < .001). In addition, discrimination directly exerted a significant, positive effect on switching (β = .25, p < .001). These findings suggest that switching may ultimately be caused by discrimination on the part of the host’s majority society or individuals. This study’s findings contribute to the theory that switching is a way for immigrants to protect themselves if they perceive discrimination from – or feel conflicted toward – the society in which they live.No potential conflict of interest relevant to this article was reported.HindawiActa Medica Okayama2090-652820202020Eosinophilic Gastritis in a Patient Previously Treated with Dupilumab6381670ENMasayaIwamuroDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine,Dentistry and Pharmaceutical SciencesToshiMurakamiSatsuki Naika ClinicTakehiroTanakaDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesShoheiOkaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine,Dentistry and Pharmaceutical SciencesSeijiKawanoDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine,Dentistry and Pharmaceutical SciencesYoshiroKawaharaDepartment of Practical Gastrointestinal Endoscopy, Okayama University HospitalHiroyukiOkadaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine,Dentistry and Pharmaceutical SciencesA 77-year-old Japanese man with bronchial asthma was treated with dupilumab. Dupilumab treatment was discontinued at the patient's request after two injections separated by a 2-week interval. The blood eosinophil count was elevated, and an esophagogastroduodenoscopy performed 3 months after dupilumab treatment revealed gastric ulcers; subsequently, eosinophilic gastritis was diagnosed from biopsy examinations. The gastric lesions were resolved by steroid administration. This case report underscores that eosinophil-associated gastrointestinal diseases should be considered in the differential diagnosis of gastric lesions occurring in patients who were treated with dupilumab.No potential conflict of interest relevant to this article was reported.SpringerActa Medica Okayama0344-57048612020Influences of preoperative metformin on immunological factors in early breast cancer5563ENTakahiroTsukiokiOkayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesTadahikoShienOkayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesTakehiroTanakaDepartment of Pathology, Okayama University HospitalYokoSuzukiOkayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesYukikoKajiharaOkayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesMinamiHatonoOkayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesKengoKawadaOkayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesMarikoKochiOkayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesTakayukiIwamotoOkayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesHirokuniIkedaOkayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesNarutoTairaOkayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesHiroyoshiDoiharaOkayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesShinichiToyookaOkayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesPurpose</br>
Metformin has been suggested to possibly reduce cancer risk. However, the mechanism underlying the positive effects of metformin on cancer treatment remains unclear. We conducted a prospective study to evaluate the effects of preoperative metformin in patients with early breast cancer.</br>
Method</br>
We evaluated the effects on immunological factors (TILs, CD4 + , CD8 + , PD-L1, IFNγ and IL-2) by comparing core needle biopsies (CNB) obtained before metformin treatment with surgical specimens. Seventeen patients were enrolled in this prospective study from January to December 2016. We also analyzed 59 patients undergoing surgery during the same period to reveal the correlation of immune factors between CNB and surgical specimen.</br>
Result</br>
There was a moderate correlation between CNB and surgical specimens on TILs and CD8 + lymphocyte. (TILs Rs = 0.63, CD4 + Rs = 0.224, CD8 + Rs = 0.42) In the metformin group, TILs increases were confirmed in five (29%) patients, while a decrease was confirmed in two (12%). The expressions of CD4 + and CD8 + by TILs were increased in 41% and 18% of surgical specimens, respectively. However, TILs number (p = 0.0554), CD4+ (p = 0.0613) and CD8 + (p = 0.0646) expressions did not significantly increased. Furthermore, IFNγ expression appeared to be increased in response to metformin (p = 0.08).</br>
Conclusion</br>
Preoperative metformin tends to increase TILs, as well as the numbers of CD4 and CD8 positive lymphocytes, and IFNγ levels. Metformin might improve immune function and have a possibility of chemo-sensitivity and thereby increase the effectiveness of immunotherapy, based on the results of this preliminary study.No potential conflict of interest relevant to this article was reported.MDPIActa Medica Okayama2077-0383952020Diagnostic Role of 18F-Fluorodeoxyglucose Positron Emission Tomography in Gastric Mesenchymal Tumors1301ENMasayaIwamuroDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesKojiMiyaharaDepartment of Internal Medicine, Hiroshima City HospitalChihiroSakaguchiDepartment of Endoscopy, National Hospital Organization Shikoku Cancer CenterRyutaTakenakaDepartment of Internal Medicine, Tsuyama Chuo HospitalSayoKobayashiDepartment of Internal Medicine, Fukuyama City HospitalHirokazuMouriDepartment of Gastroenterology and Hepatology, Kurashiki Central HospitalShigetomiTanakaDepartment of Gastroenterology, Kagawa Prefectural Central HospitalTatsuyaToyokawaDepartment of Gastroenterology, Fukuyama Medical CenterShouichiTanakaDepartment of Gastroenterology, Iwakuni Clinical CenterMamoruNishimuraDepartment of Internal Medicine, Okayama City HospitalKenjiYamauchiDepartment of Gastroenterology, Mitoyo General HospitalTakehiroTanakaDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesHiroyukiOkadaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesThere have been no comparative studies investigating the results of 18F-fluorodeoxyglucose (FDG)-positron emission tomography (PET) in patients with gastric mesenchymal tumors, including leiomyomas, leiomyosarcomas, schwannomas, and gastrointestinal stromal tumors (GISTs). We retrospectively reviewed the data of 142 patients with pathologically diagnosed gastric mesenchymal tumors treated at 11 institutions. We analyzed the correlation between the maximum standardized uptake value (SUVmax) evaluated using fluorodeoxyglucose-positron emission tomography (FDG-PET) and the tumor size. The correlation between the SUVmax and mitotic index was also investigated in GISTs. The SUVmax (mean +/- standard deviation) was 0.5 +/- 0.6 in very low-risk GISTs (n = 42), 2.1 +/- 0.7 in low-risk GISTs (n = 26), 4.9 +/- 0.8 in intermediate-risk GISTs (n = 22), 12.3 +/- 0.8 in high-risk GISTs (n = 20), 1.0 +/- 1.0 in leiomyomas (n = 15), 6.9 +/- 1.2 in schwannomas (n = 10), and 3.5 in a leiomyosarcoma (n = 1). The SUVmax of GISTs with an undetermined risk classification was 4.2 +/- 1.3 (n = 8). Linear associations were observed between the SUVmax and tumor size in GISTs, leiomyomas, and schwannomas. The SUVmax of GISTs with a high mitotic index was significantly higher than that of GISTs with a low mitotic index (9.6 +/- 7.6 vs. 2.4 +/- 4.2). In conclusion, we observed positive correlations between the SUVmax and tumor size in GISTs, leiomyomas, and schwannomas. The SUVmax also positively correlated with the mitotic index and risk grade in GISTs. Schwannomas showed a higher FDG uptake than GISTs and leiomyomas.No potential conflict of interest relevant to this article was reported.HindawiActa Medica Okayama2090-652820202020Intestinal Diffuse Large B-Cell Lymphoma in a Patient with Systemic Lupus Erythematosus7947540ENMasayaIwamuroDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine,Dentistry, and Pharmaceutical SciencesTakahideTakahashiDivision of Medical Support, Okayama University HospitalYokoOtaDepartment of Pathology & Experimental Medicine, Okayama University Graduate School of Medicine,Dentistry, and Pharmaceutical SciencesTakehiroTanakaDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesNoboruAsadaDepartment of Hematology and Oncology, Okayama University HospitalShuyaYanoDepartment of Gastroenterological Surgery, Okayama University Graduate School of Medicine,Dentistry, and Pharmaceutical SciencesMayuUkaDepartment of Radiology, Okayama University HospitalReiNakamuraDepartment of Nephrology, Rheumatology, Endocrinology and Metabolism, Okayama University Graduate School of Medicine,Dentistry, and Pharmaceutical SciencesYukiBabaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine,Dentistry, and Pharmaceutical SciencesSeijiKawanoDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine,Dentistry, and Pharmaceutical SciencesYoshiroKawaharaDepartment of Practical Gastrointestinal Endoscopy, Okayama University HospitalHiroyukiOkadaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine,Dentistry, and Pharmaceutical SciencesA 44-year-old Japanese woman with systemic lupus erythematosus (SLE) presented to our hospital with abdominal pain. Radiological and endoscopic examinations led to the diagnosis of diffuse large B-cell lymphoma of the jejunum, which was subsequently resected. Patients with SLE reportedly have an increased risk of non-Hodgkin lymphoma, as demonstrated by our patient. Hence, lymphoma should be considered in the differential diagnosis of neoplastic lesions emerging in SLE patients. In addition, flow cytometry using endoscopically biopsied fragments is useful for the immediate diagnosis of lymphoma, leading to timely and accurate preoperative staging.No potential conflict of interest relevant to this article was reported.The Japanese Society for Horticultural ScienceActa Medica Okayama218901028912020Effect of Defoliation on Blossom-end Rot Incidence and Calcium Transport into Fruit of Tomato Cultivars Under Moderate Water Stress2229ENAnnah KhatenjeIndecheGraduate School of Environmental and Life Science, Okayama UniversityYuichiYoshidaGraduate School of Environmental and Life Science, Okayama UniversityTanjuroGotoGraduate School of Environmental and Life Science, Okayama UniversityKen-ichiroYasubaGraduate School of Environmental and Life Science, Okayama UniversityYoshiyukiTanakaGraduate School of Environmental and Life Science, Okayama UniversityThe translocation of calcium (Ca) within the tomato plant and the causes of Ca deficiency, a factor associated with blossom-end rot (BER) in fruit, are still a matter of conjecture. The objective of this study was to determine the effect of defoliation on BER incidence and Ca transport into different size tomato fruit cultivars. Four experiments were conducted. The start and end dates for each experiment were; 14 March–2 May, 22 July–23 August, 30 August–7 October 2017, and 20 May–25 June 2018, for experiments 1, 2, 3, and 4, respectively. Five tomato cultivars including one large (‘Momotaro fight (MF)’, ≥ 200 g), three medium (‘Lui 60 (L60)’, ‘Tio cook (TC)’, and ‘Cindy sweet (CS)’, 30–80 g), and one small (‘Pepe (PP)’, ≤ 20 g) fruit cultivars, respectively, were grown under moderate water stress controlled by a combination of root zone restriction and solar mediated fertigation. Leaf area of plants was reduced by 20–30% by removing alternate leaflets on all leaves. Defoliation significantly reduced BER in all experiments. In experiment 4, no BER was observed in defoliated plants of L60 and PP, and in MF and TC, BER incidence decreased to a quarter of the control. Defoliation increased the fruit growth rate (FGR) in experiment 1, in which the temperature was the lowest, by a ratio of 1.42 and by 1.39 in experiment 4, in which the radiation was strongest and day length longest. Defoliation increased the rate of daily Ca transport into fruit (CTR) in MF, L60, TC, CS, and PP by average ratios of 1.64, 1.55, 1.35, 1.30, and 1.13, respectively. The increase in CTR in defoliated plants was highest in experiment 4 with a ratio of 1.68 followed by 1.37, 1.33, and 1.28 in experiments 1, 3, and 2, respectively. Defoliation increased both FGR and CTR and there were significant linear relationships between them. However, the degree of increase was larger in CTR than that in FGR, especially in the BER-sensitive large fruit cultivar MF, and defoliation increased the total Ca concentration in fruit accordingly. We conclude that under moderate water stress by root zone restriction and certain other BER inductive conditions, defoliation could be a promising approach to reduce BER incidence by improving Ca nutrition in susceptible large fruit cultivars.No potential conflict of interest relevant to this article was reported.American Chemical Society Acta Medica Okayama1549961816142020Lennard-Jones Parameters Determined to Reproduce the Solubility of NaCl and KCl in SPC/E, TIP3P, and TIP4P/2005 Water24602473ENTakumaYagasakiResearch Institute for Interdisciplinary Science, Okayama UniversityMasakazuMatsumotoResearch Institute for Interdisciplinary Science, Okayama UniversityHidekiTanakaResearch Institute for Interdisciplinary Science, Okayama UniversityMost classical nonpolarizable ion potential models underestimate the solubility values of NaCl and KCl in water significantly. We determine Lennard-Jones parameters of Na+, K+, and Cl– that reproduce the solubility as well as the hydration free energy in dilute aqueous solutions for three water potential models, SPC/E, TIP3P, and TIP4P/2005. The ion–oxygen distance in the solution and the cation–anion distance in salt are also considered in the parametrization. In addition to the target properties, the hydration enthalpy, hydration entropy, self-diffusion coefficient, coordination number, lattice energy, enthalpy of solution, density, viscosity, and number of contact ion pairs are calculated for comparison with 17 frequently used or recently developed ion potential models. The overall performance of each ion model is represented by a global score using a scheme that was originally developed for comparison of water potential models. The global score is better for our models than for the other 17 models not only because of the quite good prediction for the solubility but also because of the relatively small deviation from the experimental value for many of the other properties.No potential conflict of interest relevant to this article was reported.Acta Medica Okayama2020Synthesis and Properties of Multinuclear Iron(II) Complexes with Bis(bidentate) Schiff Base Ligands Containing Imidazole Groups ENTsubasaTanakaGraduate School of Natural Science and Technology, Okayama UniversityNo potential conflict of interest relevant to this article was reported.Okayama University Medical SchoolActa Medica Okayama0386-300X7422020Association between Histological Types and Enhancement of Dynamic CT for Primary Lung Cancer129135ENShogoFukumaDepartment of Radiology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesTakayoshiShinyaDepartment of Radiology, Okayama University HospitalJunichiSohDepartment of General Thoracic Surgery, Breast and Endocrinological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesRyuichiroFukuharaDepartment of Pediatric Radiology, Okayama University HospitalNanakoOgawaDepartment of Radiology, Okayama University HospitalFumiyoHigakiDepartment of Radiology, Okayama City General Medical CenterTakehiroTanakaDepartment of Pathology, Okayama University HospitalEikiIchiharaDepartment of Allergy and Respiratory Medicine, Okayama University HospitalTakaoHirakiDepartment of Radiology, Okayama University HospitalShinichiToyookaDepartment of General Thoracic Surgery, Breast and Endocrinological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesSusumuKanazawaDepartment of Radiology, Okayama University HospitalOriginal Article10.18926/AMO/58271 The aim of this study was to explore enhancement patterns of different types of primary lung cancers on 2-phase dynamic computed tomography (CT). This study included 217 primary lung cancer patients (141 adenocarcinomas [ADs], 48 squamous cell carcinomas [SCCs], 20 small cell lung carcinomas [SCLCs], and 8 others) who were examined using a 2-phase dynamic scan. Regions of interest were identified and mean enhancement values were calculated. After excluding the 20 SCLCs because these lesions had different clinical stages from the other cancer types, the mean attenuation values and subtractions between phases were compared between types of non-small cell lung carcinomas (NSCLCs) using the Kruskal–Wallis test. Late phase attenuation and attenuation of the late minus unenhanced phase (LMU) of SCCs were significantly higher than those of ADs (p<0.05). To differentiate SCC and AD in the late phase, a threshold of 80.21 Hounsfield units (HU) gave 52.9% accuracy. In LMU, a threshold of 52.16 HU gave 59.3% accuracy. Dynamic lung CT has the potential to aid in differentiating among NSCLC types.No potential conflict of interest relevant to this article was reported.Okayama University Medical SchoolActa Medica Okayama0386-300X7422020The Diagnostic Capacity of Pre-treatment 18F-FDG PET/CT for Predicting the Extranodular Spread of Lymph Node Metastases in Patients with Oral Squamous Cell Carcinoma123128ENRyuichiroFukuharaDepartment of Radiology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesTakayoshiShinyaDepartment of Radiology, Okayama Diagnostic Imaging Center, Okayama university HospitalShogoFukumaDepartment of Radiology, Okayama Diagnostic Imaging Center, Okayama university HospitalNanakoOgawaDepartment of Radiology, Okayama Diagnostic Imaging Center, Okayama university HospitalYoshihisaMasaokaDepartment of Radiology, Okayama Diagnostic Imaging Center, Okayama university HospitalTakehiroTanakaDepartment of Pathology, Okayama Diagnostic Imaging Center, Okayama university HospitalHidenoriMarunakaDepartment of Otolaryngology-Head & Neck Surgery, Okayama Diagnostic Imaging Center, Okayama university HospitalTadashiAriokaDepartment of Radiology, Okayama Diagnostic Imaging Center, Okayama university HospitalTakaoHirakiDepartment of Radiology, Okayama Diagnostic Imaging Center, Okayama university HospitalMitsumasaKajiDepartment of Radiology, Okayama Diagnostic Imaging Center, Okayama university HospitalSusumuKanazawaDepartment of Radiology, Okayama Diagnostic Imaging Center, Okayama university HospitalOriginal Article10.18926/AMO/58270 The aim of this study was to evaluate the ability of pretreatment 90-min 18F-fluorodeoxyglucose positron emission tomography/computed tomography (18F-FDG PET/CT) to predict the extranodular spread of lymph node metastases in oral squamous cell carcinoma. We retrospectively reviewed the cases of 56 patients who underwent pretreatment 18F-FDG PET/CT and surgery with neck dissection. Maximum standardized uptake value, metabolic tumor volume, and total lesion glycolysis were measured for the 56 primary sites and maximum standardized uptake value was measured for 115 lymph node levels. Extranodular spread was present at 9 lymph node levels in 7 patients. Significant differences were found in metabolic tumor volume and total lesion glycolysis of the primary site, and in lymph node maximum standardized uptake value, between patients with and without extranodular spread (p<0.05). Combining primary site total lesion glycolysis and lymph node maximum standardized uptake volume at their respective optimal cutoffs, the sensitivity, specificity, and accuracy for predicting extranodular spread were 89%, 92%, and 92%, respectively. Pretreatment 18F-FDG PET/CT is useful for predicting extranodular spread in patients with oral squamous cell carcinoma. The combined use of primary site total lesion glycolysis and lymph node maximum standardized uptake value showed greater predictive value than either predictor singly.No potential conflict of interest relevant to this article was reported.岡山医学会Acta Medica Okayama0030-155813132019患者会と共に展開する遺伝性大腸癌の医療153157ENKohjiTanakayaKohjiDepartment of surgery, Division of cancer genome-based diagnostic and treatment, National hospital organization, Iwakuni clinical centerNo potential conflict of interest relevant to this article was reported.岡山大学大学院法務研究科Acta Medica Okayama1881-1485232020行政代執行に伴う移転物件の保管について103109EN10.18926/OLR/58166No potential conflict of interest relevant to this article was reported.Acta Medica Okayama0386-22089542019Hypervelocity collision and water-rock interaction in space preserved in the Chelyabinsk ordinary chondrite165177ENEizoNakamuraThe Pheasant Memorial Laboratory, Institute for Planetary Materials, Okayama UniversityTakKunihiroThe Pheasant Memorial Laboratory, Institute for Planetary Materials, Okayama UniversityTsutomuOtaThe Pheasant Memorial Laboratory, Institute for Planetary Materials, Okayama UniversityChieSakaguchiThe Pheasant Memorial Laboratory for Geochemistry and Cosmochemistry, Institute for Planetary Materials, Okayama UniversityRyojiTanakaThe Pheasant Memorial Laboratory for Geochemistry and Cosmochemistry, Institute for Planetary Materials, Okayama UniversityHiroshiKitagawaOkayama Univ, Inst Planetary Mat, Pheast Mem Lab Geochem & CosmochemKatsuraKobayashiThe Pheasant Memorial Laboratory for Geochemistry and Cosmochemistry, Institute for Planetary Materials, Okayama UniversityMasahiroYamanakaThe Pheasant Memorial Laboratory for Geochemistry and Cosmochemistry, Institute for Planetary Materials, Okayama UniversityYuriShimakiThe Pheasant Memorial Laboratory for Geochemistry and Cosmochemistry, Institute for Planetary Materials, Okayama UniversityGray E.BeboutThe Pheasant Memorial Laboratory for Geochemistry and Cosmochemistry, Institute for Planetary Materials, Okayama UniversityHitoshiMiuraGraduate School of Natural Sciences, Nagoya City UniversityTetsuoYamamotoInstitute of Low Temperature Science, Hokkaido UniversityVladimirMalkovetsThe Pheasant Memorial Laboratory for Geochemistry and Cosmochemistry, Institute for Planetary Materials, Okayama UniversityVictorGrokhovskyInstitute of Physics and Technology, Ural Federal UniversityOlgaKorolevaInstitute of Mineralogy, Ural Branch of the Russian Academy of Sciences South-Ural State UniversityKonstantinLitasovV.S. Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of SciencesA comprehensive geochemical study of the Chelyabinsk meteorite reveals further details regarding its history of impact-related fragmentation and melting, and later aqueous alteration, during its transit toward Earth. We support an similar to 30 Ma age obtained by Ar-Ar method (Beard et al., 2014) for the impact-related melting, based on Rb-Sr isotope analyses of a melt domain. An irregularly shaped olivine with a distinct 0 isotope composition in a melt domain appears to be a fragment of a silicate-rich impactor. Hydrogen and Li concentrations and isotopic compositions, textures of Fe oxyhydroxides, and the presence of organic materials located in fractures, are together consistent with aqueous alteration, and this alteration could have pre-dated interaction with the Earth's atmosphere. As one model, we suggest that hypervelocity capture of the impact-related debris by a comet nucleus could have led to shock-wave-induced supercritical aqueous fluids dissolving the silicate, metallic, and organic matter, with later ice sublimation yielding a rocky rubble pile sampled by the meteorite.No potential conflict of interest relevant to this article was reported.Oxford University PressActa Medica Okayama0022-35306082019Transition from Plume-driven to Plate-driven Magmatism in the Evolution of the Main Ethiopian Rift16811715ENDejene HailemariamFeyissaThe Pheasant Memorial Laboratory for Geochemistry and Cosmochemistry, Institute for Planetary Materials, Okayama UniversityHiroshiKitagawaThe Pheasant Memorial Laboratory for Geochemistry and Cosmochemistry, Institute for Planetary Materials, Okayama UniversityTesfaye DemissieBizunehThe Pheasant Memorial Laboratory for Geochemistry and Cosmochemistry, Institute for Planetary Materials, Okayama UniversityRyojiTanakaThe Pheasant Memorial Laboratory for Geochemistry and Cosmochemistry, Institute for Planetary Materials, Okayama UniversityKurkuraKabetoThe Pheasant Memorial Laboratory for Geochemistry and Cosmochemistry, Institute for Planetary Materials, Okayama UniversityEizoNakamuraThe Pheasant Memorial Laboratory for Geochemistry and Cosmochemistry, Institute for Planetary Materials, Okayama University New K-Ar ages, major and trace element concentrations, and Sr-Nd-Pb isotope data are presented for Oligocene to recent mafic volcanic rocks from the Ethiopian Plateau, the Main Ethiopian Rift (MER), and the Afar depression. Chronological and geochemical data from this study are combined with previously published datasets to reveal secular variations in magmatism throughout the entire Ethiopian volcanic region. The mafic lavas in these regions show variability in terms of silica-saturation (i.e. alkaline and sub-alkaline series) and extent of differentiation (mafic through intermediate to felsic). The P-T conditions of melting, estimated using the least differentiated basalts, reveal a secular decrease in the mantle potential temperature, from when the flood basalt magmas erupted (up to 1600 degrees C) to the time of the rift-related magmatism (<1500 degrees C). Variations in the Sr-Nd-Pb isotopic compositions of the mafic lavas can account for the involvement of multiple end-member components. The relative contributions of these end-member components vary in space and time owing to changes in the thermal condition of the asthenosphere and the thickness of the lithosphere. The evolution of the Ethiopian rift is caused by a transition from plume-driven to plate-driven mantle upwelling, although the present-day mantle beneath the MER and the Afar depression is still warmer than normal asthenosphere.No potential conflict of interest relevant to this article was reported.American Roentgen Ray SocietyActa Medica Okayama0361-803X2020Differentiation of Small (≤ 4 cm) Renal Masses on Multiphase Contrast-Enhanced CT by Deep Learning18ENTakashiTanakaDepartment of Radiology, Okayama University HospitalYongHuangDepartment of Medical Informatics, Okayama University HospitalYoheiMarukawaDepartment of Radiology, Okayama University HospitalYukaTsuboiDepartment of Radiology, Okayama University HospitalYoshihisaMasaokaDepartment of Radiology, Okayama University HospitalKatsuhideKojimaDepartment of Radiology, Okayama University HospitalToshihiroIguchiDepartment of Radiology, Okayama University HospitalTakaoHirakiDepartment of Radiology, Okayama University HospitalHideoGobaraDepartment of Radiology, Okayama University HospitalHiroyukiYanaiDepartment of Radiology, Okayama University HospitalYasutomoNasuDepartment of Urology, Okayama University HospitalSusumuKanazawaDepartment of Radiology, Okayama University HospitalOBJECTIVE.<br/>
This study evaluated the utility of a deep learning method for determining whether a small (≤ 4 cm) solid renal mass was benign or malignant on multiphase contrast-enhanced CT. <br/> MATERIALS AND METHODS.<br/>
This retrospective study included 1807 image sets from 168 pathologically diagnosed small (≤ 4 cm) solid renal masses with four CT phases (unenhanced, corticomedullary, nephrogenic, and excretory) in 159 patients between 2012 and 2016. Masses were classified as malignant (n = 136) or benign (n = 32). The dataset was randomly divided into five subsets: four were used for augmentation and supervised training (48,832 images), and one was used for testing (281 images). The Inception-v3 architecture convolutional neural network (CNN) model was used. The AUC for malignancy and accuracy at optimal cutoff values of output data were evaluated in six different CNN models. Multivariate logistic regression analysis was also performed. <br/>
RESULTS. <br/> Malignant and benign lesions showed no significant difference of size. The AUC value of corticomedullary phase was higher than that of other phases (corticomedullary vs excretory, p = 0.022). The highest accuracy (88%) was achieved in corticomedullary phase images. Multivariate analysis revealed that the CNN model of corticomedullary phase was a significant predictor for malignancy compared with other CNN models, age, sex, and lesion size. <br/>
CONCLUSION. <br/> A deep learning method with a CNN allowed acceptable differentiation of small (≤ 4 cm) solid renal masses in dynamic CT images, especially in the corticomedullary image model.No potential conflict of interest relevant to this article was reported.Japanese Society for Lymphoratic Tissue ResearchActa Medica Okayama1346-42805942019Are there primary intraocular lymphomas that do not develop into central nervous system lymphomas?168174ENToshihikoMatsuoOphthalmology, Okayama University Hospital and Okayama University Medical SchoolTakehiroTanakaPathology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesPrimary intraocular lymphomas frequently develop into central nervous system lymphomas and vice versa. This study reviewed 22 consecutive patients with primary intraocular lymphoma diagnosed by immunostaining of vitrectomy cell blocks, and examined whether they developed central nervous system lymphoma. Seventeen patients developed central nervous system lymphoma: 3 patients developed intraocular and central nervous system lymphoma simultaneously, 9 patients developed central nervous system lymphoma 1 month to 5 years (median, 3 months) after intraocular lymphoma, and 5 patients developed central nervous system lymphoma preceding the diagnosis of intraocular lymphoma by 3 months to 9 years and 8 months (median, 1.5 years). In contrast, 5 patients did not develop central nervous system lymphoma: 2 patients did not develop local recurrence or central nervous system lymphoma in the follow-up period of 5 years and 11 years, respectively, after vitrectomy alone without additional local or systemic treatment. The remaining 3 patients with intraocular lymphoma had insufficient follow-up periods to determine the prognosis. The results of CD5 immunostaining of vitrectomy specimens were found in pathology reports of 8 patients: 3 patients with CD5-positive large cells and 4 patients with CD5-negative large cells developed central nervous system lymphoma. In summary, only a small number of patients did not develop central nervous system lymphoma based on long-term follow-up after vitrectomy alone. CD5 was not a marker of central nervous system involvement in this study population.No potential conflict of interest relevant to this article was reported.Nature Publishing GroupActa Medica Okayama2045-232292019PD-L1 expression combined with microsatellite instability/CD8+tumor infiltrating lymphocytes as a useful prognostic biomarker in gastric cancer4633ENToshiakiMorihiroDepartment of Gastroenterological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesShinjiKurodaDepartment of Gastroenterological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesNobuhikoKanayaDepartment of Gastroenterological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesYoshihikoKakiuchiDepartment of Gastroenterological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesTetsushiKubotaDepartment of Gastroenterological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesKatsuyukiAoyamaDepartment of Gastroenterological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesTakehiroTanakaDepartment of Pathology, Okayama UniversitySatoruKikuch Department of Gastroenterological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesTakeshiNagasakaDepartment of Clinical Oncology, Kawasaki Medical SchoolMasahikoNishizakiDepartment of Gastroenterological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesShunsukeKagawaDepartment of Gastroenterological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesHiroshiTazawaDepartment of Gastroenterological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesToshiyoshiFujiwaraDepartment of Gastroenterological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesWhile the importance of programmed death-ligand 1 (PD-L1), mutation burden caused by microsatellite instability (MSI), and CD8+ tumor infiltrating lymphocytes (TILs) has become evident, the significance of PD-L1 expression on prognosis still remains controversial. We evaluated the usefulness of combined markers of PD-L1 and MSI or CD8+ TILs as a prognostic biomarker in gastric cancer. A total of 283 patients with gastric cancer were reviewed retrospectively. PD-L1 expression on >5% tumor cells was defined as PD-L1-positive. PD-L1-positive rate was 15.5% (44/283). PD-L1 positivity was significantly correlated with invasive and advanced cancer and also significantly correlated with MSI, whereas no significance was observed with CD8+ TILs. Kaplan-Meier analysis showed that PD-L1 positivity significantly correlated with a poor prognosis (p = 0.0025). Multivariate analysis revealed that PD-L1 positivity was an independent poor prognostic factor (hazard ratio [HR]: 1.97, p = 0.0106) along with diffuse histological type and lymph node metastases. Combinations of PD-L1 and MSI (HR: 2.18) or CD8+ TILs (HR: 2.57) were stronger predictive factors for prognosis than PD-L1 alone. In conclusion, combined markers of PD-L1 and MSI or CD8+ TILs may be more useful prognostic biomarkers in gastric cancer, and better clarify the immune status of gastric cancer No potential conflict of interest relevant to this article was reported.Sage PublicationsActa Medica Okayama2324-709672019Lacrimal Sac Malignant Melanoma in 15 Japanese Patients: Case Report and Literature Review16ENToshihikoMatsuoOkayama University Graduate School of Interdisciplinary Science and Engineeing in Health SystemsTakehiroTanakaDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesOsamuYamasakiDepartment of Dermatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesBackground. Primary malignant melanoma of the lacrimal sac is rare. A patient with lacrimal sac melanoma was presented, and 14 Japanese patients with lacrimal sac melanoma in the literature were reviewed. Case Presentation. A 78-year-old Japanese man was presented with painless swelling of the lacrimal sac on the left side. Dacryocystectomy revealed diffuse infiltration with large epithelioid cells, sometimes with pigments, which were positive for cocktail mix of antibodies to tyrosinase, melan A (MART-1), and HMB45, leading to pathological diagnosis of melanoma. One month later, positron emission tomography (PET) revealed 2 high-uptake sites (SUVmax = 10.29 and 15.38) at the levels of medial canthus and nasolacrimal duct, but no abnormal uptake in the other site of the body. The lesion had the BRAF V600E mutation. He began to take daily oral dabrafenib (BRAF inhibitor) and trametinib (MEK inhibitor), leading to no abnormal uptake on PET in half a year. He had stable disease in good physical status with small and weak uptake sites of lymph nodes on PET 1 year later. Results. In the review of 15 Japanese patients, including this patient, local recurrence was noted in 4 patients, regional lymph node metastasis only in 3, distant metastasis in 6, and no metastasis in 6. Five patients died within 2 years and the others were alive in short follow-up periods. Conclusions. Chemotherapy was the standard for local recurrence or metastasis. Emerging molecular target drugs, as shown in the present patient, would change the strategy for management of lacrimal sac melanoma.No potential conflict of interest relevant to this article was reported.SpringerActa Medica Okayama1346-45234642019Contrast-enhanced harmonic endoscopic ultrasound using time–intensity curve analysis predicts pathological grade of pancreatic neuroendocrine neoplasm449458ENSaimonTakadaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesHironariKatoDepartment of Gastroenterology and HepatologyOkayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesYosukeSaragaiDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesShinichiroMuroDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesDaisukeUchidaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesTakeshiTomodaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesKazuyukiMatsumotoDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesShigeruHoriguchiDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesNoriyukiTanakaDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesHiroyukiOkadaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesPURPOSE:<br/>
Histological grading is important for the treatment algorithm in pancreatic neuroendocrine neoplasms (PNEN). The present study examined the efficacy of contrast-enhanced harmonic endoscopic ultrasound (CH-EUS) and time-intensity curve (TIC) analysis of PNEN diagnosis and grading.<br/>
METHODS:<br/>
TIC analysis was performed in 30 patients using data obtained from CH-EUS, and a histopathological diagnosis was made via EUS-guided fine-needle aspiration or surgical resection. The TIC parameters were analyzed by dividing them into G1/G2 and G3/NEC groups. Then, patients were classified into non-aggressive and aggressive groups and evaluated.<br/>
RESULTS:<br/>
Twenty-six patients were classified as G1/G2, and four as G3/NEC. From the TIC analysis, five parameters were obtained (I: echo intensity change, II: time for peak enhancement, III: speed of contrast, IV: decrease rate for enhancement, and V: enhancement ratio for node/pancreatic parenchyma). Three of these parameters (I, IV, and V) showed high diagnostic performance. Using the cutoff value obtained from the receiver-operating characteristic (ROC) analysis, the correct diagnostic rates of parameters I, IV, and V were 96.7%, 100%, and 100%, respectively, between G1/G2 and G3/NEC. A total of 21 patients were classified into the non-aggressive group, and nine into the aggressive group. Using the cutoff value obtained from the ROC analysis, the accurate diagnostic rates of I, IV, and V were 86.7%, 86.7%, and 88.5%, respectively, between the non-aggressive and aggressive groups.
<br/>
CONCLUSION:<br/>
CH-EUS and TIC analysis showed high diagnostic accuracy for grade diagnosis of PNEN. Quantitative perfusion analysis is useful to predict PNEN grade diagnosis preoperatively.No potential conflict of interest relevant to this article was reported.CANCER INTELLIGENCEActa Medica Okayama1754-6605132019Two cases of gastric mucosa-associated lymphoid tissue (MALT) lymphoma masquerading as follicular gastritis933ENMasayaIwamuroDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesTakehiroTanakaDepartment of Pathology, Okayama University HospitalKenjiNishidaDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesHiromitsuKanzakiDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesSeijiKawanoDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesYoshiroKawaharaDepartment of Endoscopy, Okayama University HospitalTadashiYoshinoDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesHiroyukiOkadaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences In this report, we describe two cases of extranodal marginal zone lymphoma of mucosa-associated lymphoid tissue (MALT lymphoma) of the stomach, which presented with multiple small, whitish nodules in the gastric body. The endoscopic appearance was similar to that of lymphoid follicular hyperplasia found in follicular gastritis or nodular gastritis. Both patients were positive for Helicobacter pylori, and the eradication treatment resulted in complete remission of the lymphoma. However, recurrence was noted in one patient. These cases indicate that, although infrequent, gastric MALT lymphoma can show a nodular appearance resembling that of follicular gastritis.No potential conflict of interest relevant to this article was reported.HindawiActa Medica Okayama1687-61212019Long-Term Outcome in Patients with a Solitary Peutz-Jeghers Polyp8159072ENMasayaIwamuroDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesYukiAoyamaDepartment of Gastroenterology, Kagawa Prefectural Central Hospital,SeiyuuSuzukiDepartment of Gastroenterology, Sumitomo Besshi HospitalSayoKobayashiDepartment of Internal Medicine, Fukuyama City HospitalTatsuyaToyokawaDepartment of Gastroenterology, Fukuyama Medical CenterYukiMoritouDepartment of Internal Medicine, Hiroshima City Hiroshima Citizens HospitalShinichiroHoriDepartment of Endoscopy, Shikoku Cancer CenterKazuhiroMatsuedaDepartment of Gastroenterology and Hepatology, Kurashiki Central HospitalMasaoYoshiokaDepartment of Internal Medicine, Okayama Saiseikai General HospitalTakehiroTanakaDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesHiroyukiOkadaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesBACKGROUND:<br/>
Clinical characteristics and prognosis of patients with a solitary Peutz-Jeghers polyp (PJP) have not been fully investigated.<br/>
METHODS:<br/>
Solitary PJP was diagnosed when a single hamartomatous lesion was identified in the gastrointestinal tract of patients without mucocutaneous pigmentation or a family history of Peutz-Jeghers syndrome. We retrospectively reviewed 51 patients (32 men and 19 women) with a solitary PJP and analyzed the sex, age at diagnosis, endoscopic features, and outcomes in this patient group. The STK11/LKB1 germline mutation was not investigated in any of the patients.<br/>
RESULTS:<br/>
The mean age of the 51 patients was 66.1 years. The polyp was found in the duodenum (N = 10), jejunum (N = 2), cecum (N = 2), transverse colon (N = 5), sigmoid colon (N = 21), or rectum (N = 11). Most of the polyps presented as a pedunculated lesion (N = 40), followed by semipedunculated (N = 9) and sessile (N = 2) morphologies. The mean size of a solitary PJP was 15.6 mm (range: 5 to 33 mm). During a mean endoscopic follow-up period of 4.5 years (range: 0.1 to 16.1 years), no recurrence was identified. Eighteen of the enrolled patients had a history of cancer or concomitant cancer. Five patients died due to non-gastrointestinal-related causes. No additional cancer or death directly related to solitary PJP was observed.<br/>
CONCLUSIONS:<br/>
Solitary PJPs did not recur in this study. Although examination of the entire gastrointestinal tract using esophagogastroduodenoscopy, enteroscopy, and colonoscopy is desirable to exclude Peutz-Jeghers syndrome, follow-up endoscopy after endoscopic polyp resection may be unnecessary, once the diagnosis of a solitary PJP is made.No potential conflict of interest relevant to this article was reported.Acta Medica Okayama0944117454112019The relationship between the PD-L1 expression of surgically resected and fine-needle aspiration specimens for patients with pancreatic cancer10191028ENKazuyukiMatsumotoDepartment of Gastroenterology and HepatologyOkayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesToshiakiOharaDepartment of Pathology and Experimental MedicineOkayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesMasayoshiFujisawaDepartment of Pathology and Experimental MedicineOkayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesAkinobuTakakiDepartment of Gastroenterology and HepatologyOkayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesMasahiroTakaharaNoriyukiTanakaDepartment of PathologyOkayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesHironariKatoDepartment of Gastroenterology and HepatologyOkayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesShigeruHoriguchiDepartment of Gastroenterology and HepatologyOkayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesRyuichiYoshidaDepartment of Gastroenterological Surgery, Transplant and Surgical OncologyOkayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesYuzoUmedaDepartment of Gastroenterological Surgery, Transplant and Surgical OncologyOkayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesSoichiroFushimiDepartment of PathologyHimeji Red Cross HospitalTakahitoYagiDepartment of Gastroenterological Surgery, Transplant and Surgical OncologyOkayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesAkihiroMatsukawaDepartment of Pathology and Experimental MedicineOkayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesHiroyukiOkadaDepartment of Gastroenterology and HepatologyOkayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesBACKGROUND:</br>
Recently, therapeutic antibodies against programmed death-1/programmed death-ligand 1 (PD-1/PD-L1) have shown promising clinical results for several solid tumors, including pancreatic cancer. In this study, we evaluated the relationship between the PD-L1 expression of surgical resected and fine-needle aspiration (FNA) specimens for patients with pancreatic cancer.
</br>
METHODS:</br>
Of 121 patients who underwent endoscopic ultrasound-guided (EUS)-FNA before surgery for pancreatic cancer in an academic center, the 94 (78%) with adequate FNA specimens for a histological evaluation were retrospectively analyzed. All the patients had undergone upfront surgery without any chemotherapy or radiotherapy. We performed immunohistochemistry (IHC) staining to investigate the PD-L1 expression in both resected and FNA specimens. The positive-stained cells were counted, and their percentage was used for the investigation.
</br>
RESULTS:</br>
Of the 94 patients, 16 (17%) and 11 (10%) were defined as positive on resected cancer specimens using cutoff points of 5% and 10% positively stained cancer cell counts, respectively. The concordance rates for the positive frequency of PD-L1 expression between resected and FNA specimens were 44% (7/16) and 55% (6/11) when the positivity was set to ≥ 5% and ≥ 10%, respectively. The concordance rates for the negative frequency of PD-L1 expression between two specimens were 97% (76/78) and 99% (82/83) when the positivity was set to ≥ 5% and ≥ 10%, respectively.
</br>
CONCLUSIONS:</br>
Approximately, half of the patients with PD-L1 expression positive and almost all the patients with PD-L1 expression negative could be diagnosed on FNA specimens.No potential conflict of interest relevant to this article was reported.Okayama University Medical SchoolActa Medica Okayama0386-300X7352019A Granulation Polyp in the Colon Masquerading as Metastatic Cancer457461ENMasayaIwamuroDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesMasahiroTakaharaDepartment of General Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesTatsuhiroYamazakiDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesTakehiroTanakaDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesYoshitakaKondoDepartment of Gastroenterological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesSakikoHiraokaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesHiroyukiOkadaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesCase Report10.18926/AMO/57377 A 60-year-old Caucasian male was diagnosed with lung adenocarcinoma and multiple metastases to the bone, spleen, and brain. He underwent radiotherapy for the brain and lumbar spine metastases, plus chemotherapy (cisplatin and pemetrexed). The chemotherapy was discontinued due to vomiting and hyponatremia, and nivolumab was then administered. Eight months later, 18F-fluorodeoxyglucose positron emission tomography showed tracer uptake in the colon. Colonoscopy revealed a reddish multinodular polyp in the sigmoid colon. The polyp showed irregular microvessels. No colonic mucosal surface structures were observed. Colonic metastasis of the lung carcinoma was highly suspected; the polyp was therefore surgically removed. The histological analysis revealed granulation tissue and suppurative inflammation without neoplastic changes. We diagnosed the lesion as a granulation polyp. Despite the difficulty in diagnosing these lesions due to their rarity and similarity to metastatic colon tumors, we suggest that recognizing the endoscopic features of the polyp surface may allow a preoperative diagnosis.No potential conflict of interest relevant to this article was reported.American Institute of PhysicsActa Medica Okayama0021960615042019Phase diagram of ice polymorphs under negative pressure considering the limits of mechanical stability041102ENTakahiroMatsuiGraduate School of Natural Science and Technology, Okayama UniversityTakumaYagasakiResearch Institute for Interdisciplinary Science, Okayama UniversityMasakazuMatsumotoResearch Institute for Interdisciplinary Science, Okayama UniversityHidekiTanakaResearch Institute for Interdisciplinary Science, Okayama University Thermodynamic and mechanical stabilities of various ultralow-density ices are examined using computer simulations to construct the phase diagram of ice under negative pressure. Some ultralow-density ices, which were predicted to be thermodynamically metastable under negative pressures on the basis of the quasi-harmonic approximation, can exist only in a narrow pressure range at very low temperatures because they are mechanically fragile due to the large distortion in the hydrogen bonding network. By contrast, relatively dense ices such as ice Ih and ice XVI withstand large negative pressure. Consequently, various ices appear one after another in the phase diagram. The phase diagram of ice under negative pressure exhibits a different complexity from that of positive pressure because of the mechanical instability.No potential conflict of interest relevant to this article was reported.American Institute of PhysicsActa Medica Okayama00219606150212019Liquid-liquid separation of aqueous solutions: A molecular dynamics study214506ENTakumaYagasakiResearch Institute for Interdisciplinary Science, Okayama UniversityMasakazuMatsumotoResearch Institute for Interdisciplinary Science, Okayama UniversityHidekiTanakaResearch Institute for Interdisciplinary Science, Okayama University In the liquid-liquid phase transition scenario, supercooled water separates into the high density liquid (HDL) and low density liquid (LDL) phases at temperatures lower than the second critical point. We investigate the effects of hydrophilic and hydrophobic solutes on the liquid-liquid phase transition using molecular dynamics simulations. It is found that a supercooled aqueous NaCl solution separates into solute-rich HDL and solute-poor LDL parts at low pressures. By contrast, a supercooled aqueous Ne solution separates into solute-rich LDL and solute-poor HDL parts at high pressures. Both the solutes increase the high temperature limit of the liquid-liquid separation. The degree of separation is quantified using the local density of solute particles to determine the liquid-liquid coexistence region in the pressure-temperature phase diagram. The effects of NaCl and Ne on the phase diagram of supercooled water are explained in terms of preferential solvation of ions in HDL and that of small hydrophobic particles in LDL, respectively.No potential conflict of interest relevant to this article was reported.American Institute of PhysicsActa Medica Okayama0021960615162019Formation of Hot Ice Caused by Carbon Nanobrushes064702ENTakumaYagasakiResearch Institute for Interdisciplinary Science, Okayama UniversityMasaruYamasakiGraduate School of Natural Science and Technology, Okayama UniversityMasakazuMatsumotoResearch Institute for Interdisciplinary Science, Okayama UniversityHidekiTanakaResearch Institute for Interdisciplinary Science, Okayama University Confinement in nanoscaled porous materials changes properties of water significantly. We perform molecular dynamics simulations of water in a model of a nanobrush made of carbon nanotubes. Water crystallizes into a novel structure called dtc in the nanobrush when (6,6) nanotubes are located in a triangular arrangement, and there is a space that can accommodate two layers of water molecules between the tubes. The mechanism of the solidification is analogous to formation of gas hydrates: hydrophobic molecules promote crystallization when their arrangement matches ordered structures of water. This is supported by a statistical mechanical calculation, which bears resemblance to the theory on the clathrate hydrate stability.No potential conflict of interest relevant to this article was reported.American Institute of PhysicsActa Medica Okayama0021-9606150212019A Bayesian approach for identification of ice Ih, ice Ic, high density, and low density liquid water with a torsional order parameter214504ENMasakazuMatsumotoResearch Institute for Interdisciplinary Science, Okayama UniversityTakumaYagasakiResearch Institute for Interdisciplinary Science, Okayama UniversityHidekiTanakaResearch Institute for Interdisciplinary Science, Okayama University An order parameter is proposed to classify the local structures of liquid and solid water. The order parameter, which is calculated from the O–O–O–O dihedral angles, can distinguish ice Ih, ice Ic, high density, and low density liquid water. Three coloring schemes are proposed to visualize each of the coexisting phases in a system using the order parameter on the basis of Bayesian decision theory. The schemes are applied to a molecular dynamics trajectory in which ice nucleation occurs following spontaneous liquid-liquid separation in the deeply supercooled region as a demonstration.No potential conflict of interest relevant to this article was reported.ElsevierActa Medica Okayama1930-04331462019Imaging an intrapulmonary solitary fibrous tumor with CT and F-18 FDG PET/CT755758ENTakayoshiShinyaDepartment of Pediatric Radiology, Okayama University HospitalYoshihisaMasaokaDepartment of Radiology, Okayama University HospitalMotohiroSandoDepartment of Radiology, Okayama University HospitalShinTanabeDepartment of Radiology, Okayama University HospitalSoichiroOkamotoDepartment of Radiology, Okayama University HospitalHirokiIharaDepartment of Radiology, Okayama University HospitalTakehiroTanakaDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesShinjiOtaniDepartment of General Thoracic Surgery, Okayama University HospitalTakaoHirakiDepartment of Radiology, Okayama University HospitalSusumuKanazawaDepartment of Radiology, Okayama University HospitalIntrapulmonary solitary fibrous tumors (SFTs) are extremely rare neoplasms. We report a case of an intrapulmonary SFT and describe the findings of computed tomography (CT) and F-18 fluorodeoxyglucose positron emission tomography. The case indicates that a benign intrapulmonary SFT can present as a ground-glass nodule in the early stages of disease and may appear as a well-defined, lobular, homogeneously enhanced mass with slow growth on chest CT images. To our knowledge, this is the first report describing the natural course of an intrapulmonary SFT over 16 years based on the findings of chest CT and F-18 fluorodeoxyglucose positron emission tomography/CT.No potential conflict of interest relevant to this article was reported.ElsevierActa Medica Okayama159086585112019Gastric lanthanum phosphate deposition masquerading as white globe appearance168ENMasayaIwamuroDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesHaruoUrataCentral Research Laboratory, Okayama University Medical SchoolTakehiroTanakaDepartment of Pathology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesHiroyukiOkadaDepartment of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesNo potential conflict of interest relevant to this article was reported.ElsevierActa Medica Okayama030192683342019Tourmaline in a Mesoarchean pelagic hydrothermal system: Implications for the habitat of early life105475ENTsutomuOtaPheasant Memorial Laboratory for Geochemistry and Cosmochemistry, Institute for Planetary Materials, Okayama UniversityYuheiAiharaDepartment of Earth and Planetary Sciences, Kyushu UniversityShoichiKiyokawaDepartment of Earth and Planetary Sciences, Kyushu UniversityRyojiTanakaPheasant Memorial Laboratory for Geochemistry and Cosmochemistry, Institute for Planetary Materials, Okayama UniversityEizoNakamuraThe Pheasant Memorial Laboratory, Institute for Planetary Materials, Okayama University The RNA World hypothesis requires the synthesis of RNA to allow the emergence of life on Earth. Hydrothermal systems have been proposed as potential candidates for constructing complex biomolecules. However, in order to successfully form RNA, it is necessary to stabilize ribose, a RNA carbohydrate component. Borate has been found to stabilize ribose. Therefore, boron rich hydrothermal systems are important environments concerning the origin of life on Earth.
<br/>
The 3.2-Ga Dixon Island Formation of the West Pilbara Superterrane, Western Australia, is a volcano-sedimentary sequence. The Formation represents a Mesoarchean pelagic hydrothermal system, which formed adjacent to an immature island arc. Fine-grained tourmaline, in addition to biogenic carbonaceous matter and spherulitic and tubular bacteriomorphs, are found in black chert. A boron-rich environment was responsible for the formation of these deposits. To explore the implications of such a boron enriched environment on microbial activity, modes of occurrence and chemical compositions of the tourmaline were examined.
<br/>
The tourmaline is schorl or dravite of the alkali tourmaline group and the boron isotope compositions range in δ11B from -7.3 to +2.6‰. The tourmaline occurs in microcrystalline quartz matrix of black chert veins that cross cut a volcanic unit and also in a bedded black chert, which overlays the volcanic unit. The volcanic unit contains highly altered zones with hydrothermal veins. The associated lithologic and stratigraphic features suggest that the black chert veins were the conduits for upward moving hydrothermal fluids, which reached the sea floor. Subsequently, the volcanic unit was covered by organic matter-rich cherty sediments that in part were fed, and/or altered, by the hydrothermal fluids.
<br/>
These results suggest that the origin of boron enrichment to form Dixon Island tourmaline is not the associated sedimentary mineral assemblage, which includes diagenetic clay, low-grade metamorphic mica, and organic matter. Instead, the tourmaline was directly precipitated from hydrothermal fluid, enriched in boron. Furthermore, the hydrothermal fluids had already concentrated the boron, in the Mesoarchean pelagic system, prior to the apex of organic matter production and microbial activity. Our findings support a hypothesis that the boron-enriched hydrothermal environment aided the survival and evolution of early life.No potential conflict of interest relevant to this article was reported.John WileyActa Medica Okayama163944884342019Method to Suppress Isobaric and Polyatomic Interferences for Measurements of Highly Siderophile Elements in Desilicified Geological Samples611633ENXiaoyuZhouThe Pheasant Memorial Laboratory for Geochemistry and Cosmochemistry, Institute for Planetary Materials, Okayama UniversityRyojiTanakaThe Pheasant Memorial Laboratory for Geochemistry and Cosmochemistry, Institute for Planetary Materials, Okayama UniversityMasahiroYamanakaThe Pheasant Memorial Laboratory for Geochemistry and Cosmochemistry, Institute for Planetary Materials, Okayama UniversityChieSakaguchiThe Pheasant Memorial Laboratory for Geochemistry and Cosmochemistry, Institute for Planetary Materials, Okayama UniversityEizoNakamuraThe Pheasant Memorial Laboratory for Geochemistry and Cosmochemistry, Institute for Planetary Materials, Okayama University Sample decomposition using inverse aqua regia at elevated temperatures and pressures (e.g., Carius tube or high‐pressure asher) is the most common method used to extract highly siderophile elements (HSEs: Ru, Rh, Pd, Re, Os, Ir, Pt and Au) from geological samples. Recently, it has been recognised that additional HF desilicification is necessary to better recover HSEs, potentially contained within silicate or oxide minerals in mafic samples, which cannot be dissolved solely by inverse aqua regia. However, the abundance of interfering elements tends to increase in the eluent when conventional ion‐exchange purification procedures are applied to desilicified samples. In this study, we developed an improved purification method to determine HSEs in desilicified samples. This method enables the reduction of the ratios of isobaric and polyatomic interferences, relative to the measured intensities of HSE isotope masses, to less than a few hundred parts per million. Furthermore, the total procedural blanks are either comparable to or lower than conventional methods. Thus, this method allows accurate and precise HSE measurements in mafic and ultramafic geological samples, without the need for interference corrections. Moreover, the problem of increased interfering elements, such as Zr for Pd and Cr for Ru, is circumvented for the desilicified samples.No potential conflict of interest relevant to this article was reported.Springer Nature Publishing AGActa Medica Okayama204117231012019Origin of ocean island basalts in the West African passive margin without mantle plume involvement3022ENIyasu GetachewBelayThe Pheasant Memorial Laboratory for Geochemistry and Cosmochemistry, Institute for Planetary Materials, Okayama UniversityRyojiTanakaThe Pheasant Memorial Laboratory for Geochemistry and Cosmochemistry, Institute for Planetary Materials, Okayama UniversityHiroshiKitagawaThe Pheasant Memorial Laboratory for Geochemistry and Cosmochemistry, Institute for Planetary Materials, Okayama UniversityKatsuraKobayashiThe Pheasant Memorial Laboratory for Geochemistry and Cosmochemistry, Institute for Planetary Materials, Okayama UniversityEizoNakamuraThe Pheasant Memorial Laboratory for Geochemistry and Cosmochemistry, Institute for Planetary Materials, Okayama University The geochemical variabilities in intraplate basalts (IB) from the West African passive margin (WAPM) region, have generally been employed to indicate the presence of recycled materials in an associated upwelling mantle plume. However, the absence of time-progressive linear hotspot tracks in WAPM-IB make it difficult to explain their genesis solely by the mantle plume hypothesis. Here, we show that the Sr–Nd–Hf–Pb isotopic variations in basalts from most of the WAPM-IB could have mainly attributed to the derivation from two types of fusible regions of the refertilized subcontinental lithospheric mantle (SCLM) and the sub-lithospheric mantle. The locations and magma genesis of WAPM-IB are strongly related to the distance from the Mesozoic rift axis and the structure of the rifted SCLM. The melting of the source region can possibly be attributed to small-scale mantle convection at the base of the SCLM without the involvement of a mantle plume.No potential conflict of interest relevant to this article was reported.Acta Medica Okayama2019メルロ＝ポンティの政治哲学――共存と変革ENYusukeTanakaGraduate School of Humanities and Social Sciences, Okayama UniversityNo potential conflict of interest relevant to this article was reported.Acta Medica Okayama2019Donor-derived cell-free DNA is associated with acute rejection and decreased oxygenation in primary graft dysfunction after living donor-lobar lung transplantationENShinTanakaGraduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama UniversityNo potential conflict of interest relevant to this article was reported.岡山医学会Acta Medica Okayama0030-155813032018薬物相互作用（43―皮膚Ｔ細胞リンパ腫治療薬と薬物相互作用）175178ENYutaTanakaDepartment of Pharmacy, Okayama University HospitalHirotakaKanzakiDepartment of Pharmacy, Okayama University HospitalYosukeMorishitaDepartment of Pharmacy, Okayama University HospitalYoshihisaKitamuraDepartment of Pharmacy, Okayama University HospitalToshiakiSendoDepartment of Pharmacy, Okayama University HospitalNo potential conflict of interest relevant to this article was reported.岡山大学教育学部国語研究会Acta Medica Okayama2189-5414332019カリキュラム・マネジメントに資する教材研究 : 小学校・説明的文章のばあい7265ENNorioTanakaGraduate School of Education, Okayama UniversityNo potential conflict of interest relevant to this article was reported.岡山大学大学院文化科学研究科Acta Medica Okayama1880-9162182019日本人学生むけムスリム文化アシミレーターの改訂版を用いた異文化間教育の試み5366ENSachikoNakanoTomokoTanaka10.18926/56521No potential conflict of interest relevant to this article was reported.岡山大学農学部Acta Medica Okayama2186-77551082019B（ホウ素）欠乏処理がイチゴのチップバーンおよび受精不良果発生に及ぼす影響513ENMihoSesumiGraduate school of Environmental and Life ScienceYuichiYoshidaGraduate school of Environmental and Life ScienceAkariKinjoGraduate school of Environmental and Life ScienceKeiHidakaAsahi Kagaku Kogyo Co., Ltd.)TanjuroGotoGraduate school of Environmental and Life ScienceKen-ichiroYasubaGraduate school of Environmental and Life ScienceYoshiyukiTanakaGraduate school of Environmental and Life ScienceBoron (B) is an essential micro element for plants and plays important roles in the synthesis and functions of cell wall. B deficiency has been reported as one of the causes of fruit malformation in strawberries. We investigated the effect of B deficiency on flower and fruit development of forced strawberries for two cropping seasons (2015-2017). In the second season, B was resupplied for B-deficient plants and we investigated changes in fruit development. When B-free nutrient solutions were supplied, tip burn began to occur in newly emerging leaves and calyx 2 to 3 months later, and fruit malformation including seedy or only partly developed fruits with undeveloped achenes occurred frequently. However, these deficient symptoms were quickly disappeared by supplying B containing nutrient solutions. In conclusion, B nutrition is closely related to the occurrence of fruit malformation through fertility of pollen and pistils, and also development of receptacle tissue in strawberries. It should be possible to reduce fruit malformation in strawberries by proper control of B nutrition.No potential conflict of interest relevant to this article was reported.岡山大学大学院社会文化科学研究科Acta Medica Okayama1881-1671462018メルロ＝ポンティの哲学に断絶はあるのか？ : メルロ＝ポンティの表現論研究の比較検討93105ENYusukeTanaka10.18926/56347No potential conflict of interest relevant to this article was reported.Acta Medica Okayama2018ダクチロライドおよびシガトキシンCTX3Cの合成研究ENTokihiroTanakaGraduate School of Natural Science and Technology, Okayama UniversityNo potential conflict of interest relevant to this article was reported.Acta Medica Okayama2018Local electronic states and pair amplitudes in the vortex states of spin-triplet superconductorsENKentaTanakaGraduate School of Natural Science and Technology, Okayama UniversityNo potential conflict of interest relevant to this article was reported.Acta Medica Okayama2018StageUtransportで移送された粒子と咀嚼食塊中の粒子の粒度特性に関する研究ENYukiTanakaGraduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama UniversityNo potential conflict of interest relevant to this article was reported.岡山大学大学院文化科学研究科Acta Medica Okayama1880-9162172018Cross-cultural Health Psychological Perspective of Eating Behaviors : Developing Cross-cultural Dietary Education for Sojourners95104ENTomokoTanakaGraduate School of Humanities and Social Sciences, Okayama University10.18926/55797No potential conflict of interest relevant to this article was reported.