Erythropoietin-dependent acute monoblastic leukemia.

Histopathology. Skin biopsy showing infiltration by monoblasts staining with lysozyme (panel A, × 50 magnification) and bone marrow aspirate smear showing acute monoblastic leukemia (panel B, × 200 magnification), both during EPO therapy. Bone marrow aspirate smear showing the absence of leukemia 3 weeks after the discontinuation of EPO therapy (panel C, × 50 magnification).