Muscle fibers with "cracks" & rounded holes H&E stain |
 Gomori trichrime stain |
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"Checkerboard" pattern of fiber types "Cracks" & rounded holes more prominent in type I fibers  ATPase, pH 9.4 |
Immature (Intermediate-staining) muscle fibers ATPase, pH 4.3 |
Large lipid droplets in many fibers Sudan black |
 Toluidine blue | |
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Cytochrome oxidase: Reduced staining in all fibers |
Succinate dehydrogenase (SDH): Normal staining |