Major-nerve schwannomas versus intramuscular schwannomas
Acta Radiologica Volume 48 Issue 6
Page 672-677
published_at 2007
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Title ( eng ) |
Major-nerve schwannomas versus intramuscular schwannomas
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Creator |
Shimose Shoji
Sugita Takashi
Nobuto Hiroo
Tanaka Kumi
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Source Title |
Acta Radiologica
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Volume | 48 |
Issue | 6 |
Start Page | 672 |
End Page | 677 |
Abstract |
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.
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Keywords |
Schwannoma
Major nerve
Intramuscular
Target sign
MRI
Tinel-like sign
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NDC |
Medical sciences [ 490 ]
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Language |
eng
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Resource Type | journal article |
Publisher |
Informa Healthcare
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Date of Issued | 2007 |
Rights |
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
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Publish Type | Author’s Original |
Access Rights | open access |
Source Identifier |
[ISSN] 0284-1851
[DOI] 10.1080/02841850701326925
[PMID] 17611877
[NCID] AA10668717
[DOI] http://dx.doi.org/10.1080/02841850701326925
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