“Chronic lymphocytic leukemia is the most common type of leukemia in the United States,” says Sangmin Lee, MD, hematologist-oncologist at Weill Cornell Medicine and NewYork-Presbyterian. Like other types of leukemia, chronic lymphocytic leukemia (CLL) begins in the stem cells of the bone marrow.
Compared to an acute type of leukemia, CLL progresses more slowly, is less likely to cause symptoms, and is less likely to require immediate and aggressive treatment.
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