Signs of hemophagocytosis were evident in 7 of 8 cases (P1, P2, P4, P5, P6, P7, P8), with emperipolesis and PAS-positive macrophages (Fig. 2g) in the bone marrow, and highlighted by immunohistochemistry of CD68 (PG-M1) (DAKO, Code-Nr. This evidence concerns the gene CD68 and Hemophagocytosis.