- if WBC > 12 000/mm3: at least two of the following criteria: blast cells > 5% in the bone marrow, clonal cytogenetic abnormality other than t(5;12)(q33;p13), anemia (Hb < 100 g/l), thrombocytopenia (platelet count < 100G/l), splenomegaly > 5 cm below costal margin, extramedullary localization