Fig. 2
From: Anti-U3 ribonucleoprotein antibody-positive inflammatory myopathy: a case report
Transverse serial frozen sections of a muscle biopsy specimen from the right side quadriceps femoris muscles, stained with hematoxylin and eosin (HE) and monoclonal antibodies against CD8-positive T cells (CD8), human histocompatibility complex type 1 (MHC-1), CD4-positive T cells (CD4), B cells, and complement components (C5b9). The MHC-1-positive non-necrotic muscle fiber (*) was surrounded with CD8-positive T lymphocytes that invaded along the perimysium. No inflammatory cell infiltration into the muscle fibers can be seen