肩甲上神経に発生した神経鞘腫の一例

概要

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Suprascapular neuropathy due to sports or ganglion is well described, whereas schwannoma involving the suprascapular nerve is relatively rare.We present a case of schwannoma involving the suprascapular nerve.The patient is a 14-year old male. His chief complaint is right shoulder pain. He had concervative therapy, but shoulder pain continued. So he visited our hospital. His range of motion and manual muscle test of the right shoulder are within normal limits. He complained of right shoulder pain in horizontal extension. MRI identified a well-circumscribed lesion which shows iso intensity in T1 sequences and high intensity in T2 sequences in the spinoglenoid notch. MRI with gadolinium contrast revealed a mass in the spinoglenoid notch with contrast enhancement and a central area of necrosis. Electromyogram and nerve conduction velocity showed neurogenic pattern. We diagnosed neoplastic lesions involving the suprascapular nerve and resected it by open procedure. The pathological diagnosis was schwannoma.