
Overview
Red, thickened, scaly skin over the knuckles (Gottron sign) associated with dermatomyositis, an autoimmune disease of the skin and muscles.
Review Date 1/28/2025
Updated by: Diane M. Horowitz, MD, Rheumatology and Internal Medicine, Northwell Health, Great Neck, NY. 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.