Inflammatory Myopathies

Idiopathic inflammatory myopathies (IIM) are a group of chronic autoimmune disorders characterized by inflammation and degeneration of skeletal muscles. The original Bohan and Peter criteria classify inflammatory myopathies into dermatomyositis (DM), polymyositis (PM), and inclusion body myositis (IBM). Newer subtypes include autoimmune necrotizing myositis and overlap myositis (Dalakas, 2015).

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Last Update: November 2019