A phase of chronic myelogenous leukemia in which the disease is progressing. In this phase, 10% to 19% of the cells in the blood and bone marrow are blast cells (immature blood cells).
( ak-SEH-leh-ray-ted fayz KRAH-nik MY-eh-LAH-jeh-nus loo-KEE-mee-uh )
Source: NCI Dictionary of Cancer Terms
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