Morvan Syndrome: A Case Report and Review of the Literature

imageMorvan syndrome is characterized by central, autonomic, and peripheral hyperactivity. Examples of central hyperactivity include confusion, memory problems, hallucinations, insomnia, and myoclonus; examples of autonomic hyperactivity include hyperhidrosis and fluctuations in blood pressure; examples of peripheral hyperreactivity include clinical or electrophysiological evidence of painful cramps, myokymia, and neuromyotonia. We present a typical case of Morvan syndrome and the first detailed review of the clinical and therapeutic literature of all 27 cases from the English language literature. Morvan syndrome is considered to be an autoimmune disorder and antibodies against voltage-gated potassium channels are found in most cases. Oral immunomodulatory therapy, intravenous immunoglobulin, and plasmapharesis may be entertained. Thymoma is found in approximately 50% of cases and thymectomy may be curative as in our particular case.

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