Chronic granulocytic leukemia is a myeloproliferative tumor originating from pluripotent stem cells, characterized by the presence of the Philadelphia chromosome or changes in the BCR/ABL fusion gene. Chronic granulocytic leukemia progresses through four stages: asymptomatic, chronic, accelerated, and blast crisis phases. Most patients are diagnosed after the onset of symptoms. Only a very few patients are diagnosed through routine physical examinations or other reasons when blood abnormalities are discovered. The earliest symptoms experienced during the chronic phase of the illness typically include fatigue, dizziness, and abdominal discomfort. The accelerated phase is a transitional stage before the blast crisis, marking a turning point where the disease worsens. It is often difficult to distinctly separate the accelerated phase from the blast crisis, and about 20%-25% of patients may enter the blast crisis phase directly without passing through the accelerated phase.