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ID 20763
本文ファイル
著者
Shimose, Shoji
Sugita, Takashi
Nobuto, Hiroo
Tanaka, Kumi
キーワード
Schwannoma
Major nerve
Intramuscular
Target sign
MRI
Tinel-like sign
NDC
医学
抄録(英)
Background: A schwannoma is a benign peripheral nerve tumor. Predicting the involvement of a nerve on symptoms or MR findings is crucial to the diagnostic process. Purpose: To compare symptoms, MR findings, and histological findings between major nerve schwannomas and intramuscular schwannomas. Material and Methods: Thirty-four patients with 36 schwannomas (29 major nerve schwannomas and 7 intramuscular schwannomas) surgically excised and proven histologically were retrospectively reviewed. Results: Frequencies of the Tinel - like sign, split-fat sign, entering and exiting nerve, and low-signal margin indicate the presence of the nerve and were significantly higher in major nerve schwannomas than in intramuscular schwannomas. In tumor morphological patterns (the target sign, inhomogeneous pattern, and homogeneous pattern), there were no significant differences between major nerve schwannomas and intramuscular schwannomas. Schwannomas showing the target sign histologically tended to be less degenerative. All major nerve schwannomas and 5 intramuscular schwannomas produce some characteristic symptoms and/or MR findings, but two intramuscular schwannomas didn't have any characteristic symptoms and findings. Conclusion: In major nerve schwannomas, the Tinel - like sign, split-fat sign, entering and exiting nerve, and low-signal margin are commonly observed and useful for diagnosis. In intramuscular schwannomas, these characteristic findings are less common, which makes diagnosis difficult.
掲載誌名
Acta Radiologica
48巻
6号
開始ページ
672
終了ページ
677
出版年月日
2007
出版者
Informa Healthcare
ISSN
0284-1851
NCID
出版者DOI
PubMedID
言語
英語
NII資源タイプ
学術雑誌論文
広大資料タイプ
学術雑誌論文
DCMIタイプ
text
フォーマット
application/pdf
著者版フラグ
author
権利情報
Copyright (c) 2007 Taylor & Francis.
This is an electronic version of an article published in "Acta Radiologica, Volume 48, Issue 6 (2007) pages 672 - 677" Natural Product Research is available at: http://dx.doi.org/10.1080/02841850701326925
関連情報URL
部局名
医歯薬学総合研究科