Background and objective:The natural disease history of chronic myeloid leukemia (CML) typicallyevolves 3 distinct clinical stages: chronic phase(CP), accelerated phase and blast crisis.

• 慢性粒细胞白血病(Chronic myeloid leukemia，CML)的自然病程可分为慢性期(Chronic phase，CP)，加速期(Accelerated phase，CP)和急变期(Blastcrisis phase，BP)。