In MDS/MPN-U patients, the WBC count was 7.5×109/l, the Hb level was 100 g/l and the mean PLT count was 653.1×109/l, These results differ from those which were reported in China (WBC, 9.9×109/l; Hb, 85.8 g/l; and PLT, 518.5×1012/l) (3); this may be due to a fewer number of cases being analyzed. Here, GSTM1 is linked to myeloproliferative neoplasm, unclassifiable.