Suprascapular neuropathy related to a glenohumeral joint cyst

A man with shoulder pain and complaints of weakness had examination finding s consistent with a suprascapular neuropathy with predominant involvement o f the infraspinatus muscle. Electrodiagnostic studies confirmed an axon-los s suprascapular neuropathy with greater involvement of the infraspinatus mu scle. Magnetic resonance imaging (MRI) demonstrated a large ganglion cyst o riginating from the glenohumeral joint. The clinical, electrodiagnostic, an d radiologic evaluation of suprascapular neuropathy is discussed. (C) 1999 John Wiley & Sons, Inc.