CD34 and leukemia: Immunophenotyping by flow cytometry showed that leukemia cells were positive for CD13, CD33, CD64, CD38, CD9, cMPO, partial cells expressed CD117, whereas negative for CD5, CD19, CD34, HLA-DR, CD7, CD10, CD15, CD11b, CD14, CD56, CD20, GlyA, cCD79a, and cCD3.