Juvenile dermatomyositis.

Juvenile dermatomyositis (JDMS) is a chronic inflammatory condition characterized by muscle weakness and a distinctive rash caused by underlying vasculopathy. Long-term complications include subcutaneous and muscular calcification, contractures and in some cases the gradual development of a second connective tissue disease. Early aggressive treatment with systemic immunosuppressants and other agents such as intravenous immunoglobulin (IVIG) reduces mortality and morbidity.