acute lymphoblastic leukemia

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WordNet Dictionary
	Definition:		[n]  acute leukemia characterized by proliferation of immature lymphoblast-like cells in bone marrow, lymph nodes, spleen, and blood; most common in children
	Synonyms:		acute lymphocytic leukemia
	See Also:		acute leukemia
Medical Dictionary
	Definition:		ALL. A quickly progressing disease in which too many immature white blood cells called lymphoblasts are found in the blood and bone marrow. Also called acute lymphocytic leukemia.