Skin disease is more recalcitrant than muscle disease: A long-term prospective study of 184 children with juvenile dermatomyositis

Background Persistent skin manifestations, especially calcinoses, contribute to morbidity in children with juvenile dermatomyositis. Objective To compare the course of skin and muscle involvement and document frequency of calcinosis in juvenile dermatomyositis. Methods Prospective cohort study of 184 untreated children with juvenile dermatomyositis (July 1971 to May 2019) at a single children's hospital. Results Disease Activity Scores (DASs)...