title: Acute isolated suprascapular nerve palsy limited to the infraspinatus muscle: a case report.
abstract: Suprascapular nerve palsy resulting in isolated weakness of the infraspinatus muscle is subtle at its onset and must be differentiated from cervical radiculopathy or bone and joint diseases of the shoulder, especially in the presence of pain. The literature suggests an association of cumulative trauma with ganglionic cyst formation and entrapment neuropathy of the suprascapular nerve in the spinoglenoid notch. Here we present clinical, electrodiagnostic, and radiologic features in a young patient who presented with a 2-week history of isolated, painless weakness of the right shoulder. His electromyography showed acute denervation of the right infraspinatus muscle. Magnetic resonance imaging revealed a ganglionic cyst in the spinoglenoid fossa and edema in the infraspinatus muscle consistent with denervation. The patient recovered after removal of the cyst.
authors.affiliation: Departments of Neurology, North Shore University Hospital, 300 Community Drive, Manhasset, NY 11030, USA. sanjaymittalmd@hotmail.com
authors.forename: Sanjay
authors.initials: S
authors.lastname: Mittal
authors.forename: Michael
authors.initials: M
authors.lastname: Turcinovic
authors.forename: Elaine S
authors.initials: ES
authors.lastname: Gould
authors.forename: S Murthy
authors.initials: SM
authors.lastname: Vishnubhakat
mesh_terms: D000328:Adult; D019299:Decompression, Surgical; D004576:Electromyography; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D009121:Muscle Denervation / Q000534:rehabilitation*; D018908:Muscle Weakness / Q000209:etiology* / Q000534:rehabilitation; D009133:Muscular Atrophy / Q000209:etiology / Q000534:rehabilitation; D009408:Nerve Compression Syndromes / Q000175:diagnosis* / Q000601:surgery; D026741:Physical Therapy Modalities; D011182:Postoperative Care; D012540:Scapula / Q000294:innervation*; D013581:Synovial Cyst / Q000175:diagnosis* / Q000601:surgery