Among the 113 patients newly diagnosed with CN-AML, no differences were observed between BDH2high and BDH2low groups with regard to clinical features or biological characteristics such as age, sex, WBCs, Hb, platelets, blasts in peripheral blood, blasts in BM, amount of CD34 expression in BM myeloblasts, and French-American-British (FAB) classification subtypes (Table 1). This evidence concerns the gene CD34 and acute myeloid leukemia.