JaLCDOI 10.18926/AMO/52012
FullText URL 67_6_385.pdf
Author Tanaka, Masato| Arataki, Shinya| Sugimoto, Yoshihisa| Takigawa, Tomoyuki| Tetsunaga, Tomoko| Ozaki, Toshifumi|
Abstract Craniometaphyseal dysplasia is a rare genetic condition characterized by progressive thickening of bones in the skull and metaphyseal abnormalities in the long bones. This disorder often causes progressively symptomatic cranial nerve compression, but in rare cases foramen magnum stenosis may lead to quadriplegia. Chiari I malformation with craniometaphyseal dysplasia is extremely rare. The authors report on a 25-year-old woman with myelopathy due to Chiari I malformation along with craniometaphyseal dysplasia. There are only four previous case reports of this condition. The authors present here the fifth case report of this rare condition and summarize its characteristics.
Keywords craniometaphyseal dysplasia Chiari malformation cervicomedullary compression
Amo Type Case Report
Published Date 2013-12
Publication Title Acta Medica Okayama
Volume volume67
Issue issue6
Publisher Okayama University Medical School
Start Page 385
End Page 389
ISSN 0386-300X
NCID AA00508441
Content Type Journal Article
language 英語
Copyright Holders CopyrightⒸ 2013 by Okayama University Medical School
File Version publisher
Refereed True
PubMed ID 24356723
Web of Science KeyUT 000328915700007
Author Shiozaki, Yasuyuki| Kitajima, Takashi| Mazaki, Tetsuro| Yoshida, Aki| Tanaka, Masato| Umezawa, Akihiro| Nakamura, Mariko| Yoshida, Yasuhiro| Ito, Yoshihiro| Ozaki, Toshifumi| Matsukawa, Akihiro|
Published Date 2013-04
Publication Title International Journal of Nanomedicine
Volume volume8
Issue issue1
Content Type Journal Article
JaLCDOI 10.18926/AMO/52899
FullText URL 68_5_303.pdf
Author Tanaka, Masato| Sugimoto, Yoshihisa| Arataki, Shinya| Takigawa, Tomoyuki| Ozaki, Toshifumi|
Abstract Spinal deformity is an important clinical manifestation of Chiari I malformation (CM-I) and syringomyelia. Here we report the result of an 8-year follow-up of a 13-year-old girl with severe scoliosis associated with Chiari malformation and a large syringomyelia. The patient presented at our hospital at the age of 13 with a 68° scoliosis. Magnetic resonance imaging showed Chiari malformation and a large syringomyelia. Neurosurgical treatment involved foramen magnum decompression and partial C1 laminectomy, but the scoliosis still progressed. We present the first case report of a rare course of scoliosis in a patient with CM-I and a large syringomyelia.
Keywords Chiari I malformation syringomyelia scoliosis
Amo Type Case Report
Published Date 2014-10
Publication Title Acta Medica Okayama
Volume volume68
Issue issue5
Publisher Okayama University Medical School
Start Page 303
End Page 306
ISSN 0386-300X
NCID AA00508441
Content Type Journal Article
language 英語
Copyright Holders CopyrightⒸ 2014 by Okayama University Medical School
File Version publisher
Refereed True
PubMed ID 25338487
Web of Science KeyUT 000343269300007
JaLCDOI 10.18926/AMO/52901
FullText URL 68_5_313.pdf
Author Yamane, Kentaro| Tanaka, Masato| Sugimoto, Yoshihisa| Ichimura, Kouichi| Ozaki, Toshifumi|
Abstract Ossified meningioma is classified histologically as a phenotype of metaplastic meningioma, and it is extremely rare. There are only 12 cases involving ossified spinal meningiomas in the literature. We present the case of a 61-year-old female with a primary tumor within the ventral spinal canal at T12. Although we performed a total tumor excision using an ultrasonic bone aspirator, a temporary deterioration of motor evoked potentials (MEPs) was observed during curettage with a Kerrison rongeur. The neurologic findings worsened immediately after surgery. Histologically, the tumor was diagnosed as a metaplastic meningioma with osseous differentiation. In order to avoid spinal cord injury, great care must be taken when removing an ossified meningioma located on the ventral spinal cord.
Keywords spinal metaplastic meningioma osseous differentiation ossified meningioma ultrasonic bone aspirator post-operative course
Amo Type Case Report
Published Date 2014-10
Publication Title Acta Medica Okayama
Volume volume68
Issue issue5
Publisher Okayama University Medical School
Start Page 313
End Page 316
ISSN 0386-300X
NCID AA00508441
Content Type Journal Article
language 英語
Copyright Holders CopyrightⒸ 2014 by Okayama University Medical School
File Version publisher
Refereed True
PubMed ID 25338489
Web of Science KeyUT 000343269300009
Author Mazaki, Tetsuro| Shiozaki, Yasuyuki| Yamane, Kentaro| Yoshida, Aki| Nakamura, Mariko| Yoshida, Yasuhiro| Zhou, Di| Kitajima, Takashi| Tanaka, Masato| Ito, Yoshihiro| Ozaki, Toshifumi| Matsukawa, Akihiro|
Published Date 2014-03-25
Publication Title Scientific Reports
Volume volume4
Content Type Journal Article
JaLCDOI 10.18926/AMO/54807
FullText URL 70_6_449.pdf
Author Watanabe, Noriyuki| Sugimoto, Yoshihisa| Tanaka, Masato| Mazaki, Tetsuro| Arataki, Shinya| Takigawa, Tomoyuki| Kataoka, Masaki| Kunisada, Toshiyuki| Ozaki, Toshifumi|
Abstract Metastatic epidural spinal cord compression (MESCC) is a common complication in patients with a malignant tumor, but it is difficult to decide the proper time to perform the necessary surgery. Here we analyzed the prognostic factors for postoperative walking ability. We retrospectively reviewed the cases of 112 MESCC patients treated surgically at our institute and divided them into ambulatory (n= 88) and non-ambulatory (n=24) groups based on their American Spinal Injury Association (ASIA) Impairment Scale grades at the final follow-up. We also classified the patients preoperatively using the revised Tokuhashi score. We assessed the correlation between preoperative or intraoperative factors and postoperative walking ability in both groups. Of the 10 patients classified preoperatively as grade A or B, 2 (20 ) were ambulatory at the final follow-up. Of the 102 patients classified preoperatively as grade C, D or E, 86 (84 ) were ambulatory at the final follow-up (p<0.001). There were no significant differences between the groups in the average total Tokuhashi score. Our analysis revealed that the severity of paralysis significantly affects neurological recovery in patients with MESCC. Patients with MESCC should receive surgery before the preoperative ASIA Impairment Scale grade falls below grade C.
Keywords metastatic epidural spinal cord compression American Spinal Injury Association Impairment Scale Tokuhashi score walking ability prognostic factor
Amo Type Original Article
Published Date 2016-12
Publication Title Acta Medica Okayama
Volume volume70
Issue issue6
Publisher Okayama University Medical School
Start Page 449
End Page 453
ISSN 0386-300X
NCID AA00508441
Content Type Journal Article
language 英語
Copyright Holders CopyrightⒸ 2016 by Okayama University Medical School
File Version publisher
Refereed True
PubMed ID 28003669
JaLCDOI 10.18926/AMO/54980
FullText URL 71_2_119.pdf
Author Oda, Yoshiaki| Takigawa, Tomoyuki| Sugimoto, Yoshihisa| Tanaka, Masato| Akazawa, Hirofumi| Ozaki, Toshifumi|
Abstract Patients with cerebral palsy (CP) frequently present with scoliosis; however, the pattern of curve progression is difficult to predict. We aimed to clarify the natural course of the progression of scoliosis and to identify scoliosis predictors. This was a retrospective, single-center, observational study. Total of 92 CP patients from Asahikawasou Ryouiku Iryou Center in Okayama, Japan were retrospectively analyzed. Cobb angle, presence of hip dislocation and pelvic obliquity, and Gross Motor Function Classification System (GMFCS) were investigated. Severe CP was defined as GMFCS level IV or V. The mean observation period was 10.7 years. Thirtyfour severe CP patients presented with scoliosis and were divided into 3 groups based on their clinical courses: severe, moderate and mild. The mean Cobb angles at the final follow-up were 129°, 53°, and 13° in the severe, moderate, and mild groups, respectively. The average progressions from 18 to 25 years were 2.7°/year, 0.7°/year, and 0.1°/year in the severe, moderate, and mild curve groups, respectively. We observed the natural course of scoliosis and identified 3 courses based on the Cobb angle at 15 and 18 years of age. This method of classification may help clinicians predict the patients’ disease progression.
Keywords severe cerebral palsy scoliosis natural course Cobb angle progression
Amo Type Original Article
Published Date 2017-04
Publication Title Acta Medica Okayama
Volume volume71
Issue issue2
Publisher Okayama University Medical School
Start Page 119
End Page 126
ISSN 0386-300X
NCID AA00508441
Content Type Journal Article
language 英語
Copyright Holders CopyrightⒸ 2017 by Okayama University Medical School
File Version publisher
Refereed True
PubMed ID 28420893
Author Kikuchi, Takeshi| Kubota, Satoshi| Asaumi, Koji| Kawaki, Harumi| Nishida, Takashi| Kawata, Kazumi| Mitani, Shigeru| Tabata, Yasuhiko| Ozaki, Toshifumi| Takigawa, Masaharu|
Published Date 2008-06
Publication Title Tissue Engineering Part A
Volume volume14
Issue issue6
Content Type Journal Article
FullText URL fulltext.pdf
Author Tetsunaga, Tomoko| Tetsunaga, Tomonori| Nishida, Keiichiro| Misawa, Haruo| Takigawa, Tomoyuki| Yamane, Kentaro| Tsuji, Hironori| Takei, Yoshitaka| Ozaki, Toshifumi|
Keywords Peripheral neuropathic pain Mirogabalin Pregabalin Adverse event
Published Date 2020-05-26
Publication Title Journal of Orthopaedic Surgery and Research
Volume volume15
Issue issue1
Publisher Springer
Start Page 191
ISSN 1749-799X
Content Type Journal Article
language 英語
OAI-PMH Set 岡山大学
File Version publisher
PubMed ID 32456647
DOI 10.1186/s13018-020-01709-3
Web of Science KeyUT 000538017400002
Related Url isVersionOf https://doi.org/10.1186/s13018-020-01709-3
Author Yoneda, Yasushi| Ito, Sachio| Kunisada, Toshiyuki| Morimoto, Yuki| Kanzaki, Hirotaka| Yoshida, Aki| Shimizu, Kenji| Ozaki, Toshifumi| Ouchida, Mamoru|
Published Date 2013-10-09
Publication Title PLoS ONE
Volume volume8
Issue issue10
Content Type Journal Article
FullText URL CORR477_8_1892.pdf
Author Kunisada, Toshiyuki| Fujiwara, Tomohiro| Hasei, Joe| Nakata, Eiji| Senda, Masuo| Ozaki, Toshifumi|
Published Date 2019-08
Publication Title Clinical Orthopaedics and Related Research
Volume volume477
Issue issue8
Publisher Lippincott, Williams & Wilkins
Start Page 1892
End Page 1901
ISSN 0009-921X
NCID AA00607942
Content Type Journal Article
language 英語
OAI-PMH Set 岡山大学
File Version author
PubMed ID 30985613
DOI 10.1097/CORR.0000000000000764
Web of Science KeyUT 000509664400024
Related Url isVersionOf https://doi.org/10.1097/CORR.0000000000000764
FullText URL fulltext.pdf Suppl. Info.pdf Suppl. Tables.xlsx
Author Morita, Takuya| Fujiwara, Tomohiro| Yoshida, Aki| Uotani, Koji| Kiyono, Masahiro| Yokoo, Suguru| Hasei, Joe| Kunisada, Toshiyuki| Ozaki, Toshifumi|
Keywords Sarcoma Translational research
Published Date 2020-06-10
Publication Title Scientific Reports
Volume volume10
Issue issue1
Publisher Nature
Start Page 9414
ISSN 2045-2322
Content Type Journal Article
language 英語
OAI-PMH Set 岡山大学
Copyright Holders © The Author(s) 2020
File Version publisher
PubMed ID 32523124
DOI 10.1038/s41598-020-66120-8
Web of Science KeyUT 000560478900030
Related Url isVersionOf https://doi.org/10.1038/s41598-020-66120-8
JaLCDOI 10.18926/AMO/30721
FullText URL fulltext.pdf
Author Inoue, Atsushi| Asaumi, Koji| Endo, Hirosuke| Fujiwara, Kazuo| Mitani, Shigeru| Ozaki, Toshifumi|
Abstract The present retrospective study assessed radiographs to determine socket wear in total hip arthroplasty (THA) with 22-mm zirconia or COP (Cobalt-Chrome alloy rich in Cobalt and Phosphorous) heads, and in cemented stems at more than 10 years after operation. Sockets of ultra high molecular weight polyethylene were used in each of two THA groups (13 hips each) in a clinical trial in our hospital between 1989 and 1990. Three observers carried out masked assessments of the radiographs. Upon fi nal examination, there was no remarkable loosening in the zirconia or COP group, and no case had required revision surgery as of 2005. There was a statistically signifi cant diff erence between the 2 groups in average annual linear wear, at 0.093 mm/year and 0.046 mm/year in the zirconia and COP groups, respectively. Volume wear and average annual volume wear were also signifi cantly greater in the zirconia group despite its superior mechanical strength and toughness in vitro. Our present fi ndings do not confi rm early expectations of lower wear in long-term results of 22-mm zirconia femoral heads used in THA.
Keywords total hip arthroplasty zirconia head COP head polyethylene wear
Amo Type Original Article
Published Date 2006-12
Publication Title Acta Medica Okayama
Volume volume60
Issue issue6
Publisher Okayama University Medical School
Start Page 311
End Page 318
ISSN 0386-300X
NCID AA00508441
Content Type Journal Article
language 英語
File Version publisher
Refereed True
PubMed ID 17189974
Web of Science KeyUT 000243019000002
JaLCDOI 10.18926/AMO/52008
FullText URL 67_6_351.pdf
Author Yokoyama, Yusuke| Abe, Nobuhiro| Fujiwara, Kazuo| Suzuki, Masahiko| Nakajima, Yoshikazu| Sugita, Naohiko| Mitsuishi, Mamoru| Nakashima, Yoshio| Ozaki, Toshifumi|
Abstract A computer-assisted navigation system to be used for total knee arthroplasties (TKAs) was reported to improve the accuracy of bone resection and result in precise implant placement, but the concomitant surgical invasion and time consumption are clinical problems. We developed a computed tomography (CT)-based navigation system (NNS) to be used for minimally invasive TKA. It requires only the reference points from a small limited area of the medial femoral condyle and proximal tibia through a skin incision to obtain optical images. Here we evaluated the usefulness and accuracy of the NNS in comparison with the commercially available BrainLAB image-free navigation system (BLS). In a clinical experiment, the registration times obtained with the NNS tended to be shorter than those obtained with the BLS, but not significantly so. The NNS group tended to be in the extended position in the sagittal plane of the distal femur within 3 degrees, and the BLS group showed rather flexed deviation in the sagittal plane of the anterior femur.
Keywords total knee arthroplasty navigation system minimally invasive surgery
Amo Type Original Article
Published Date 2013-12
Publication Title Acta Medica Okayama
Volume volume67
Issue issue6
Publisher Okayama University Medical School
Start Page 351
End Page 358
ISSN 0386-300X
NCID AA00508441
Content Type Journal Article
language 英語
Copyright Holders CopyrightⒸ 2013 by Okayama University Medical School
File Version publisher
Refereed True
PubMed ID 24356719
Web of Science KeyUT 000328915700003
Related Url http://ousar.lib.okayama-u.ac.jp/metadata/52515
FullText URL NCN7_3_146.pdf Fig.pdf
Author Matsumoto, Namiko| Sato, Kota| Takahashi, Yoshiaki| Kawahara, Yuko| Yunoki, Taijun| Shang, Jingwei| Takemoto, Mami| Hishikawa, Nozomi| Ohta, Yasuyuki| Yamashita, Toru| Sakamoto, Maiko| Kondou, Eisei| Shibata, Rei| Yoshino, Tadashi| Ozaki, Toshifumi| Abe, Koji|
Keywords neurolymphomatosis neuro-oncology peripheral neuropathy peripheral nerve rheumatoid arthritis T-cell lymphoma
Note This fulltext will be available in Feb 2020|
Published Date 2019-02-19
Publication Title Neurology and Clinical Neuroscience
Volume volume7
Issue issue3
Publisher Wiley
Start Page 146
End Page 149
ISSN 2049-4173
Content Type Journal Article
language 英語
OAI-PMH Set 岡山大学
File Version author
DOI 10.1111/ncn3.12280
Web of Science KeyUT 000466785700011
Related Url isVersionOf https://doi.org/10.1111/ncn3.12280
JaLCDOI 10.18926/AMO/55312
FullText URL 71_4_345.pdf
Author Tanaka, Masato| Sugimoto, Yoshihisa| Takigawa, Tomoyuki| Kimata, Yoshihiro| Ozaki, Toshifumi|
Abstract Osteoradionecrosis (ORN), a well-known complication of radiotherapy in the mandibular bone, is very rare in the cervical spine. The authors report the result of a 3-year follow-up of a 63-year-old female patient with ORN of the cervical spine. The patient had a history of laryngeal carcinoma and was treated with chemotherapy and radiation therapy with a total of 120 Gy. Eight years later, she developed acute, severe neck pain due to cervical spine necrosis. The authors performed vascularized fibular bone graft and posterior pedicle screw fixation to reconstruct her cervical spine. The patient was successfully treated with surgery, and cervical alignment was preserved. She had neither neurological deficits nor severe neck pain at her final follow-up 3 years later. Delaying treatment of ORN may be life threatening, so the early diagnosis of this condition is important for patients who receive radiotherapy. Otolaryngologists and spine surgeons should understand this potential complication to speed diagnosis and treatment as early as possible.
Keywords osteoradionecrosis laryngeal carcinoma cervical spine radiotherapy
Amo Type Case Report
Published Date 2017-08
Publication Title Acta Medica Okayama
Volume volume71
Issue issue4
Publisher Okayama University Medical School
Start Page 345
End Page 349
ISSN 0386-300X
NCID AA00508441
Content Type Journal Article
language 英語
Copyright Holders CopyrightⒸ 2017 by Okayama University Medical School
File Version publisher
Refereed True
PubMed ID 28824191
JaLCDOI 10.18926/AMO/30972
FullText URL fulltext.pdf
Author Endo, Hirosuke| Asaumi, Koji| Mitani, Shigeru| Noda, Tomoyuki| Minagawa, Hiroshi| Tetsunaga, Tomonori| Ozaki, Toshifumi|
Abstract <p>A minimally invasive plate osteosynthesis technique using a locking compression plate (LCP) has been used widely in trauma cases. Its advantages are that the MIPO technique does not interfere with the fracture site and thus provides improved biological healing, and that the LCP has excellent angular stability. Its use in bone lengthening, however, has not been established. In such cases, it is desirable to shorten the external skeletal fixation period as much as possible. Here, the MIPO technique using an LCP was applied to femoral distraction osteogenesis in an attempt to shorten the external skeletal fixation period. For femoral lengthening, the MIPO technique was performed in 2 stages. Orthofix external fixators (Orthofix, England) were used to insert screws from the anterolateral side rather than from the lateral side of the femur for bone lengthening. When sufficient callus formation was detected postoperatively at the site of bone lengthening, and the absence of infection was ensured, limb draping was performed, including a whole external fixator, and then the MIPO technique was applied with an LCP. In 3 cases (5 limbs), the average duration of external skeletal fixation was 134days, the average external-fixation index was 24days/cm, and the average consolidation index was 22days/cm. The MIPO technique using an LCP made it possible to shorten the external skeletal fixation-wearing period in femoral lengthening.</p>
Keywords femoral lengthening minimally invasive plate osteosynthesis locking compression plate external skeletal fixation external-fixation index
Amo Type Original Article
Published Date 2008-10
Publication Title Acta Medica Okayama
Volume volume62
Issue issue5
Publisher Okayama University Medical School
Start Page 333
End Page 339
ISSN 0386-300X
NCID AA00508441
Content Type Journal Article
language 英語
File Version publisher
Refereed True
PubMed ID 18985094
Web of Science KeyUT 000260391300008
JaLCDOI 10.18926/AMO/32853
FullText URL fulltext.pdf
Author Endo, Hirosuke| Noda, Tomoyuki| Mitani, Shigeru| Nakahara, Ryuichi| Tetsunaga, Tomonori| Kunisada, Toshiyuki| Ozaki, Toshifumi|
Abstract <p>Femoroacetabular impingement (FAI) is a condition characterized by the impingement of the femur and acetabulum. In Japan, this disorder has become recognized gradually. Here we report a rare case of surgically treated FAI, associated with an osseous protrusion on the acetabulum of a 30-year-old female. Plain computed tomography (CT) and reconstructive 3D-CT images clearly demonstrated an anterolateral bony protrusion. Hip arthroscopy showed no degeneration of the cartilage on either the femoral or acetabular side, but degeneration at the edge of labrum was observed in the region of the bony protrusion. The complete removal of the bony protrusion under hip arthroscopy was thus considered impracticable, and a small skin incision was therefore made anteriorly to approach the acetabulum. The Short-Form 36-Item Health Survey (SF-36) revealed improvement in all scores.</p>
Keywords femoroacetabular impingement bony protrusion Pincer type hip arthroscopy SF36
Amo Type Case Report
Published Date 2010-04
Publication Title Acta Medica Okayama
Volume volume64
Issue issue2
Publisher Okayama University Medical School
Start Page 149
End Page 154
ISSN 0386-300X
NCID AA00508441
Content Type Journal Article
language 英語
File Version publisher
Refereed True
PubMed ID 20424671
Web of Science KeyUT 000276996900010
Title Alternative Japanese guidelines for the treatment of hip fractures in the elderly
FullText URL 122_253.pdf
Author Noda, Tomoyuki| Ozaki, Toshifumi|
Publication Title 岡山医学会雑誌
Published Date 2010-12-01
Volume volume122
Issue issue3
Start Page 253
End Page 257
ISSN 0030-1558
language 日本語
Copyright Holders Copyright (c) 2010 岡山医学会
File Version publisher
DOI 10.4044/joma.122.253
NAID 130004903185
Author Kinami, Yo| Noda, Tomoyuki| Ozaki, Toshifumi|
Published Date 2013-05
Publication Title Journal of Orthopaedic Science
Volume volume18
Issue issue3
Content Type Journal Article