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In medicine, leukemia is a "progressive, malignant disease of the blood-forming organs, characterized by distorted proliferation and development of leukocytes and their precursors in the blood and bone marrow. Leukemias were originally termed acute or chronic based on life expectancy but now are classified according to cellular maturity. Acute leukemias consist of predominantly immature cells; chronic leukemias are composed of more mature cells."[1]


B-cell leukemia

T-cell leukemia

Plasma cell leukemia

Mast cell leukemia

Myeloid leukemia


5-Year Relative Survival Rates By Year Dx By Leukemia type All Ages, All Races, Both Sexes 1975-2000.


  1. Anonymous (2020), Leukemia (English). Medical Subject Headings. U.S. National Library of Medicine.