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ID 48667
フルテキストURL
著者
Hisatomi, Miki Okayama Univ, Grad Sch Med Dent & Pharmaceut Sci, Field Tumor Biol, Dept Oral & Maxillofacial Radiol
Yanagi, Yoshinobu Okayama Univ Hosp, Dept Oral Diag & Dentomaxillofacial Radiol
Konouchi, Hironobu Okayama Univ Hosp, Dept Oral Diag & Dentomaxillofacial Radiol
Matsuzaki, Hidenobu Okayama Univ Hosp, Dept Oral Diag & Dentomaxillofacial Radiol
Takenobu, Toshihiko Okayama Univ, Grad Sch Med Dent & Pharmaceut Sci, Field Tumor Biol, Dept Oral & Maxillofacial Radiol
Unetsubo, Teruhisa Okayama Univ, Grad Sch Med Dent & Pharmaceut Sci, Field Tumor Biol, Dept Oral & Maxillofacial Radiol
Asaumi, Jun-ichi Okayama Univ, Grad Sch Med Dent & Pharmaceut Sci, Field Tumor Biol, Dept Oral & Maxillofacial Radiol
抄録
Typical MR images of ameloblastomas on T2-weighted image (WI) or short inversion time inversion-recovery (STIR) show multiple bright high-signal-intensity loci on a high-signal-intensity background. Unilocular cystic-type ameloblastomas show homogeneously bright high signal intensity on T2WI or STIR as a water-like signal intensity. Therefore, it is difficult to distinguish unilocular cystic-type ameloblastoma from other cystic lesions such as keratocystic odontogenic tumors, radicular cysts (residual cysts) and dentigerous cysts only on the basis of MRI signal intensity. In the present study, we evaluated whether contrast-enhanced (CE)-T1WI and dynamic CE-MRI (DCE-MRI) could provide additional information for differential diagnosis in unilocular cystic-type ameloblastoma. Images from 12 cases of suspected unilocular cystic-type ameloblastoma were evaluated in the present study. Of them, 5 had areas suspected of indicating a solid component on T1WI and T2WI (or STIR). Ten had undergone additional CE-T1WI and DCE-MRI. On 5 of 10 cases of CE-T1WI, a tiny enhancement area was detected. On 6 of 10 DCE-images, a time-course enhanced area which was suspected to be a solid component was detected. CE-T1WI was helpful in the diagnosis of ameloblastoma because the tiny enhanced areas were taken to indicate possible solid components. Moreover, the rim-enhancement area on CE-T1WI could be divided into small regions of interest, and some of these showed slightly increased enhancement on DCE-MRI, which was taken to indicate a solid component and/or intramural nodule with focal invasion of ameloblastoma tissue. DCE-MRIs of the four remaining cases, which provided no clues to the diagnosis of ameloblastoma in the manner of the above descriptions, showed thicker rim enhancement than odontogenic cysts. Thus, CE-T1WI and DCE-MRI were helpful in the differential diagnosis of unilocular cystic-type ameloblastomas with homogeneously bright high signal intensity on T2WI or STIR.
キーワード
Ameloblastoma
Unicystic
Sold/multicystic
MRI
DCE-MRI
Odontogenic tumor
Odontogenic cyst
発行日
2011-02
出版物タイトル
Oral Oncology
47巻
2号
開始ページ
147
終了ページ
152
ISSN
1368-8375
資料タイプ
学術雑誌論文
オフィシャル URL
http://dx.doi.org/10.1016/j.oraloncology.2010.11.009
言語
English
著作権者
(C) 2010 Elsevier Ltd. All rights reserved.
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査読
有り
DOI
PubMed ID
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