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(A). Mason’s trichromic stain histopathological view that reveals hypertrophy, atrophy and normal striated muscle fibers that are surrounded by fibrosis and perimysial fat; magnification 10×. (B). Hematoxylin–eosin stain that shows striated muscle with intermingled hypertrophic, atrophic, and normal fibers that are surrounded by a proliferation of collagenous fibro connective tissue that is replaced, in other instances, by adipose tissue; magnification 4×.
