ALL

Definition / meaning of ALL

An aggressive (fast-growing) type of leukemia (blood cancer) in which too many lymphoblasts (immature white blood cells) are found in the blood and bone marrow. Also called acute lymphoblastic leukemia and acute lymphocytic leukemia.

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Find More About 'ALL'

Source(s):

The Web site of the National Cancer Institute (http://www.cancer.gov/)

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