Bone marrow from a child with hemophagocytic syndrome, secondary to Epstein-Barr virus infection. Reactive histiocytes show phagocytosis of nucleated red blood cells (red arrows) and platelets (black arrows). Wright-Giemsa stain.
From Brunning, RD, McKenna, RW. Tumors of the bone marrow. Atlas of tumor pathology (electronic fascicle), Third series, fascicle 9, 1994, Washington, DC. Armed Forces Institute of Pathology.