title: Sarcoidosis appearing initially as polymyositis.
abstract: Polymyositis is an idiopathic progressive muscle disease. Occasionally, sarcoidosis can be associated with a polymyositis-like picture, both clinically and on laboratory investigation. However, serial sections of muscle biopsies will usually demonstrate sarcoid granulomas. A case of sarcoidosis that began as polymyositis with diffuse interstitial pneumonitis is presented.
mesh_terms: D003937:Diagnosis, Differential; D005260:Female; D006099:Granuloma / Q000209:etiology; D006801:Humans; D008875:Middle Aged; D009132:Muscles / Q000473:pathology; D009220:Myositis / Q000175:diagnosis*; D011658:Pulmonary Fibrosis / Q000209:etiology; D012507:Sarcoidosis / Q000150:complications / Q000175:diagnosis*; D012867:Skin / Q000473:pathology; D012871:Skin Diseases / Q000209:etiology