2. Patients in accelerated phase, defined as the presence of any of the following features: (i) blasts in peripheral blood (PB) or bone marrow (BM) >/= 15% (but < 30%), (ii) blasts + promyelocytes in PB or BM >/= 30%, (iii) basophils in PB or BM >/= 20%, (iv) platelets < 100 x 10e9/L unrelated to therapy, (v) clonal evolution.