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(A) H&E stain with necrotic fibers (arrow, 200× magnification), (B) stain for non-specific esterase with macrophages engulfing the necrotic myofiber (arrow, 200× magnification), (C) succinate dehydrogenase/cytochrome-C-oxidase (SDH/COX) combination stain with increased blue fibers, which lack cytochrome-C-oxidase function (arrows, 200× magnification), (D) DPNH stain with a nectoric fiber, but intact myotubular structures in the other myofibers (200× magnification).
