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Kaposi sarcoma. (A) Kaposi sarcoma infiltrating the subepicardial adipose tissue in a 40-year-old HIV-positive heart transplant patient (H&E stain, ×5). (B) Permeation of cardiac muscle fibers (H&E stain, ×40). (C,D) Mediastinal lymph node involvement in the same patient (C, H&E stain, ×5; D, H&E stain, ×40).
