フルテキストファイル
著者
Matsusue Eiji Department of Radiology, Tottori Prefectural Central Hospital KAKEN研究者をさがす
Fujihara Yoshio Department of Radiology, Tottori Prefectural Central Hospital
Matsuda Eiken Department of Otorhinolaryngology, Tottori Prefectural Central Hospital
Tokuyasu Yusuke Department of Pathology, Tottori Prefectural Central Hospital
Nakamoto Shu Department of Pathology, Tottori Prefectural Central Hospital
Nakamura Kazuhiko Department of Radiology, Tottori Prefectural Central Hospital
Ogawa Toshihide Division of Radiology, Department of Pathophysiological and Therapeutic Science, School of Medicine, Tottori University Faculty of Medicine
キーワード
magnetic resonance imaging
oncocytoma
parotid tumor
vanishing
Warthin tumor
NDC分類
4類 自然科学
抄録
【Background】 Of all parotid gland tumors, only oncocytoma has been reported to appear isointense to the parotid gland, namely vanishing, on fat-saturated T2 and T1 postcontrast gadolinium-enhanced magnetic resonance imaging (MRI). The purpose of this study was to evaluate vanishing of parotid tumors on conventional MRI with and/or without postcontrast gadolinium-enhancement and on diffusion weighted imaging (DWI).
【Methods】 In 8 of 51 patients, ten parotid gland tumors had homogeneously enhanced lesions and were retrospectively analysed. Comparisons of signal intensity between those parotid tumors and parotid glands and evaluations of vanishing were performed on T1-weighted imaging (T1WI), T2-weighted imaging (T2WI), fat-suppressed T2WI (FS-T2WI), postcontrast gadolinium-enhanced T1WI (CE-T1WI) and fat-suppressed CET1WI (FS-CE-T1WI), DWI as well as apparent diffusion coefficient (ADC).
【Results】 Ten parotid gland tumors consisted of five Warthin tumors, two pleomorphic adenomas, two parotid carcinomas (small cell carcinoma and adenoid cystic carcinoma) and one oncocytoma. All tumors showed hypointensity on T1WI and hyperintensity on DWI. Nine of ten tumors showed vanishing on the other MR sequences. All Warthin tumors showed vanishing on FST2WI, FS-CE-T1WI and the ADC map. One oncocytoma showed vanishing on FS-T2WI and the ADC map and hyperintensity on FS-CE-T1WI. All pleomorphic adenomas showed vanishing on T2WI and CE-T1WI. One adenoid cystic carcinoma showed vanishing only on CE-T1WI.
【Conclusion】 Vanishing of parotid tumors can be observed not only on FS-T2WI and FS-CE-T1WI but also on T2WI, CE-T1WI and ADC mapping.
出版者
Tottori University Faculty of Medicine
資料タイプ
学術雑誌論文
ISSN・ISBN
1346-8049
書誌ID
AA00892882
掲載誌名
Yonago Acta Medica
最新掲載誌名
Yonago Acta Medica
61
1
開始ページ
33
終了ページ
39
発行日
2018-03-28
著者版フラグ
出版社版
掲載情報
Yonago Acta Medica. 2018, 61(1), 33-39
部局名
医学部・医学系研究科・医学部附属病院
言語
英語