Fig. 2
a Histological section with H&E of skeletal muscle with inflammatory infiltrate, with an endomysial, perimysial and perivascular lymphocytic infiltrate. The morphological changes are indicative of inflammatory myopathy. b Close up of the section showing the endomysial and perivascular inflammatory infiltrate. c Histological section with H&E of skeletal muscle showing atrophy, angular muscle fibers with narrow edges and degenerative muscle fibers. d Immunohistochemistry CD4 staining showing the presence of many endomysial and perimysial limphocytes. e Immunohistochemistry CD8 staining showing fewer endomysial lymphocytes in comparison to the CD4 staining. g Vimentin staining in skeletal muscle shows regenerating fibers in brown. f Immunohistochemistry CD68 staining showing some endomysial and perimysial macrophages