URL of this page: //medlineplus.gov/ency/imagepages/2403.htm

Dermatomyositis on the legs

Dermatomyositis on the legs

Overview

The appearance of purple (violaceous) plaques on the knees may be associated with dermatomyositis. Typically, most lesions associated with other diseases are red (erythematous).

Update Date 1/20/2015

Updated by: Gordon A. Starkebaum, MD, professor of medicine, division of rheumatology, University of Washington School of Medicine. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.