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Autopsy showed multifocal lymphocytic myositis and myocarditis. A. Patchy necrotizing lymphocytic infiltration is observed in the myocardium (A; H&E, 40×) and skeletal muscle (B; H&E, 200×). Multiple sites of focal fibrosis were also found in the myocardium (C, Masson Trichrome, 40×.) Multifocal CD68+ macrophage infiltration accompanied lymphocytic infiltration of the myocardium (D; Anti-CD68 immunostaining, 200×).
