Complete or major hematological response Partial or minor hematological response  Loos or minimal hematological response Platelet count: >150 × 109/L WBC count: < 10 × 109/L Basophils :< 5% Differential without immature granulocytes. Absence of blasts and promyelocytes in peripheral blood Spleen : nonpalpable spleen Platelet count: <450 × 109/L WBC count: >10 × 109/L Basophils :>10%   Presence of blasts and promyelocytes in peripheral blood Spleen : Palpable spleen Platelet count: < 450 ×109/L WBC count: >20 × 109/L Basophils :15%   Presence of blasts and promyelocytes in peripheral blood Spleen : Palpable spleen

Table 1: Hematologic responses (imatinib mesylate).