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![]() H&E stain Myopathy Muscle fiber sizes: Varied Split muscle fibers Increased endomysial connective tissue |
![]() H&E stain Myopathic groups Clustered basophilic fibers (Arrow) |
![]() H&E stain Split muscle fiber (Arrow) Small fibers in region of split fiber are clustered |
![]() NADH stain Split muscle fiber (Arrow) Split is highlighted by NADH stain "Splitting" is actually partial fusion |
![]() H&E stain Pale muscle fiber (Arrow)
invaded by cells |
![]() Acid phosphatase stain Acid phosphatase-stained cells
within pale necrotic muscle fibers |
![]() VvG stain |
![]() ATPase, pH 9.4 stain Most large fibers are Type 2
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![]() ATPase, pH 4.3 stain Type 2C (intermediate staining) fibers are abundant
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![]() ATPase, pH 9.4 stain |
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![]() H&E stain Endomysial inflammation, minor
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![]() MHC Class I stain Normal distribution of MHC Class I: Only on capillaries
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![]() Sudan black stain |
![]() H&E stain Varied fiber sizes
Little necrosis or regeneration |
![]() H&E stain Varied fiber size
Abundant necrosis and regeneration |
Large group of small basophilic muscle fibers with large nuclei ![]() H&E stain |
Small muscle fibers have coarse internal architecture ![]() NADH stain |
Small muscle fibers are type 2C with intermediate staining ![]() ATPase, pH 4.3 stain |
Small muscle fibers are immature with alkaline phosphatase staining ![]() Alkaline phosphatase stain |
![]() ATPase, pH9.4 stain Small & large size fiber populations contain type I & type II
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