Hemophagocytosis by CD11c⁺ cells in bone marrow cells from patients with hemophagocytic syndrome. Bone marrow smear preparations from patients with hemophagocytic syndrome were stained with May-Grünwald-Giemsa staining (patient 1) (A), CD83 staining (patient 1) (B), CD86 staining (patient 1) (C), mannose receptor staining (patient 1) (D), or CD11c (brown)/CD61 (red) double staining for patient 1 (E), patient 2 (F-G), and patient 3 (H). The arrows indicate CD61⁺ platelets or substrates.