Ganglion causing paralysis of the suprascapular nerve: Diagnosis by MRI and ultrasonography

Abstract

A 26-year-old man had a right infraspinatus muscle weakness and aching of the shoulder due to supra-scapular nerve entrapment confirmed by electromyography. MRI revealed a well-defined area of increased signal intensity over the suprascapular notch. An ultrasonogram showed a homogeneous hypoechogenic area at the base of the scapular spine. A diagnosis was made of a ganglion compressing the inferior branch of the suprascapular nerve. After removal of several ganglia, the patient had immediate pain relief, and normal electromyographic findings were obtained 5 months postoperatively. © 1991 Informa UK Ltd All rights reserved: reproduction in whole or part not permitted.