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Washington University Experience | MUSCLE | Dermatomyositis | 2G3 Atrophy, Perifascicular (Case 2) COX 40X
COX shows pale but not absent staining of many layers of fibers at the edge of fascicles, a finding that is most severe in fascicles with muscle fiber pathology but also present in fascicles without definitive abnormalities on other stains. (Cytochrome oxidase histochemistry)
