What is necrotizing autoimmune myopathy (NAM)?

Updated: Jan 05, 2021
  • Author: Mythili Seetharaman, MD; Chief Editor: Herbert S Diamond, MD  more...
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Necrotizing autoimmune myopathy (NAM) is a recently recognized form of idiopathic inflammatory myopathy that is identified by finding macrophage-predominant myocyte destruction, with few to no lymphocytes, on muscle biopsy. NAM has been associated with malignancy and statin use. [7]

See Etiology, Presentation, and Workup.

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