Necrotizing Autoimmune Myopathy: A Rare Subset of Inflammatory Myopathy

Abstract

A 19-year-old Hispanic male with past medical history of hypothyroidism presented for progressive muscle weakness. This muscle weakness was present throughout the entire body including upper and lower extremities. Upon further evaluation was found to have antibody positive for anti-HMG CoA reductase antibody along with muscle biopsy patient showing active necrotizing myopathy, consistent with diagnosis of necrotizing autoimmune myopathy.