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a) Bone marrow aspirate smear with features of hemophagocytosis showing lymphocytes and RBCs engulfed by macrophage (Giemsa, X 400); b) bone marrow trephine biopsy showing caseating granuloma (H and E, X 200); c) bone marrow trephine biopsy showing epithelioid cell granuloma (H and E, X 400); and d) bone marrow trephine biopsy showing necrosis with marrow elements (H and E, X 400).
