PMC4782538_01
Muscle biopsy showed perimysial and endomysial mononuclear cell infiltrates, myophagocytosis (arrow head), and basophilic regenerating fibers (arrow) (hematoxylin and eosin staining)
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F1
Histopathology showed perimysial and endomysial chronic inflammatory infiltrate and myophagocytosis [Figure 1].