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腕神経叢に手術操作が及ぶ鎖骨上窩部の腫瘍性病変について検討した.10年間で診断治療を行った30症例を対象とし,年齢,性別,受診までの期間,術前症状,画像所見,病理像を検討した.神経鞘腫は13例と半数近くであったが,脂肪腫4例を含め非神経原性腫瘍も15例認められた.神経原性腫瘍群とその他の群間では術前のTinel徴候(p=0.014)とMRIで観察されるtarget sign(p=1.75×10-5)に有意な差異を呈していた.鎖骨上窩部の腫瘍性病変は神経鞘腫以外の存在も念頭に置き,Tinel徴候とtarget signで鑑別がつかない場合は生検を行う必要があるといえる.
Objective:We surveyed the clinical symptoms and radiologic features of tumor and tumor-like lesions at the supraclavicular region. Methods:Over a 10-year period, 30 patients with 30 lesions involving the brachial plexus were treated upon. We evaluated the clinical, radiologic, and pathologic features of 15 neural sheath tumors and 15 lesions with non-neural sheath origin. Results:Patients with neural sheath tumor were significantly positive to Tinel's sign (p=0.014) and target sign on MR image (p=1.75×10-5) than patients with non neural sheath tumor. Conclusions:The characteristics of clinical and radiologic findings could differentiate schwannoma from other malignant tumors of brachial plexus. Biopsy is nonetheless recommended, especially when malignancy is suspected because of Tinel's sign and/or target sign on MRI is not a concern.
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