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(A) Muscle biopsy reveals marked axonal distension of intramuscular nerve twig (arrow), using Masson's trichrome staining. (B) The intraaxonal contents in the distended axon contain NADH-TR (arrow). (C) Phosphorylated neurofilament staining (arrow). (D) Ubiquitin staining (arrow). Magnifications: (A) 200X; (B) 200X; (C) 400X; and, (D) 200X.
