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.
(Arch Dermatol 115:1336-1337, 1979)
Callen JP. Sarcoidosis Appearing Initially as Polymyositis. Arch Dermatol. 1979;115(11):1336-1337. doi:10.1001/archderm.1979.04010110042023