Polymyositis accompanying coxsackie virus B2 infection.

A case of polymyositis in a 15 year old girl demonstrating the clinical course of an infectious disease is presented. The Coxsackie virus B2 was isolated from the stools, and serum antibodies were detected. Histologic examination of muscle showed signs of myositis. The patient was treated with cortisone and recovered completely. Possible viral etiology of the polymyositis is suggested.