COLLET-SICARD-SYNDROME MIMICKING NEURALGIC AMYOTROPHY

A man with shoulder pain, wasting, and weakness had ipsilateral crania l nerve abnormalities. Electrodiagnostic studies supported a diagnosis of neuralgic amyotrophy, but we later demonstrated a spinal accessory mononeuropathy with ipsilateral hypoglossal weakness (Collet-Sicard s yndrome). Magnetic resonance imaging demonstrated an inaccessible occi pital condyle mass, and disseminated adenocarcinoma was subsequently d iagnosed. Although cranial mononeuropathies can occur in neuralgic amy otrophy, this case illustrates the importance of identifying a focal l esion, and highlights the localizing value of electrodiagnosis. (C) 19 97 John Wiley & Sons, Inc.