Acute myelomonocytic leukemia and T-lymphoblastic lymphoma as simultaneous bilineage hematologic malignancy treated with decitabine: A case report

Figure 2 Bone marrow findings. 87% of all nucleated cells in the bone marrow are leukemic blasts. Cytochemically, the leukemic cells are positive for myeloperoxidase, myeloid marker and alpha-naphthyl butyrate esterase, monocyte marker. Dual esterase stain including alpha-naphthyl acetate esterase, another nonspecific esterase and chloroacetate esterase reveals that leukemic cells are derived from monocytes. While leukemic cells are negative for Periodic acid-Schiff stain. MPO: myeloperoxidase; ANBE: alpha-naphthyl butyrate esterase; PAS: Periodic acid-Schiff.