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Distal Myopathy (MSP5; MPD2): Matrin-3 mutation H&E stain Fiber sizes: Varied Small fibers: Rounded or Polygonal

Gomori Trichrome stain

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Fiber types: Non-random distribution

ATPase pH 4.3 stain

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VvG stain

Vacuoles: Large; Sub-sarcolemmal

Congo red stain

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AMPDA stain

Matrin3 myopathy: AMPDA aggregates in muscle fibers

AMPDA stain

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Return to Neuromuscular
Return to MPD2

8/20/2025