Figure 2

Skeletal muscle biopsy. a - c: right gluteus maximus (a: Hematoxylin-eosin 1:20; b: CD4 immunostaining 1:20; c: CD8 immunostaining 1:20): Massive endomyseal inflammatory infiltration demonstrated in HE staining. Immunohistochemical analysis showed CD4 positive lymphocytes in the region of the infiltration, but also CD8 positive cells endomyseal. d - f: left vastus latealis (d: HE 1:20, e: CD4 1:20; f: CD8 1:20): HE staining revealed a more slightly inflammatory infiltration compared with the findings in the electromyographically affected right gluteus maximus (a), but also a predominance of CD4 positive cells.