Figure 1From: Hyperferritinemia in the critically ill child with secondary hemophagocytic lymphohistiocytosis/sepsis/multiple organ dysfunction syndrome/macrophage activation syndrome: what is the treatment?Bone marrow smears show activated macrophages and hemophagocytosis from bone marrow puncture. Photomicrographs of a bone marrow aspirate smear show large histiocytes (with vacuolated cytoplasm containing nuclear debris and whole red blood cells). Stain: Wright-Giemsa. Magnification: 1,000×.Back to article page