Fig. 8From: Muscle biopsy features of idiopathic inflammatory myopathies and differential diagnosisMHC-I is highly expressed on sarcolemmal of all muscle fibers and in mononuclear cells of a large perivascular infiltrate in a muscle biopsy of a patient with brachio-cervical inflammatory myopathy (BCM). The vast majority of the inflammatory cells are CD20+ B lymphocytesBack to article page