title: Collet-Sicard syndrome mimicking neuralgic amyotrophy.
abstract: A man with shoulder pain, wasting, and weakness had ipsilateral cranial nerve abnormalities. Electrodiagnostic studies supported a diagnosis of neuralgic amyotrophy, but we later demonstrated a spinal accessory mononeuropathy with ipsilateral hypoglossal weakness (Collet-Sicard syndrome). Magnetic resonance imaging demonstrated an inaccessible occipital condyle mass, and disseminated adenocarcinoma was subsequently diagnosed. Although cranial mononeuropathies can occur in neuralgic amyotrophy, this case illustrates the importance of identifying a focal lesion, and highlights the localizing value of electrodiagnosis.
authors.affiliation: Department of Neurology, University of Michigan Medical Center, Ann Arbor 48109, USA.
authors.forename: W L
authors.initials: WL
authors.lastname: Larson
authors.forename: A
authors.initials: A
authors.lastname: Beydoun
authors.forename: J W
authors.initials: JW
authors.lastname: Albers
authors.forename: J J
authors.initials: JJ
authors.lastname: Wald
mesh_terms: D000368:Aged; D020968:Brachial Plexus Neuritis / Q000175:diagnosis* / Q000503:physiopathology; D001921:Brain / Q000473:pathology; D003937:Diagnosis, Differential; D018450:Disease Progression; D004576:Electromyography; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male