Overview
Red, thickened, scaly skin over the knuckles (Gottron sign) associated with dermatomyositis, an autoimmune disease of the skin and muscles.
Review Date 1/25/2023
Updated by: Neil J. Gonter, MD, Assistant Professor of Medicine, Columbia University, NY and private practice specializing in Rheumatology at Rheumatology Associates of North Jersey, Teaneck, NJ. Review provided by VeriMed Healthcare Network. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.