Chronic Abdominal Myoclonus Controlled with Prednisone Therapy: A Case Report.

Abdominal myoclonus may manifest as involuntary, repetitive contractions of the abdominal wall due to a variety of neurologic pathologies. There are, however, limited cases reporting abdominal wall myoclonus without any clear neurologic etiologies. Here we present a case of a 72-year-old male with a history of rheumatoid arthritis, asthma, obstructive sleep apnea (OSA), and restless leg syndrome who presented with chronic, involuntary, repetitive contractions of his abdomen without any spinal or extremity involvement. His extensive neurologic and secondary systematic workup was negative, and he had a limited response to several different medication trials. The patient's abdominal myoclonus, however, was better controlled with the administration of prednisone.