Neuromuscular Diseases Section, US National Institute of Neurological Disorders and Stroke, US National Institutes of Health, Building 10, Room 4N248, Bethesda, MD 20892, USA. dalakasm@ninds.nih.gov
The clinical spectrum and immunopathogenesis of inflammatory myopathies are summarized with an update on possible triggering factors, cell degeneration, and emerging new therapies.