Leukemia Definition Leukemia is a group of bone marrow diseases involving an uncontrolled increase in white blood cells (leukocytes). For information about a specific type of leukemia, see the following: See also leukemia resources. Abeloff MD, Armitage JO, Niederhuber JE, Kastan MB, McKena WG. Clinical Oncology. 3rd ed. Orlando, Fl: Churchill Livingstone; 2004:2732. Hoffman R, Benz EJ, Shattil SS, et al. Hematology: Basic Principles and Practice. 4th ed. Orlando, Fl: Churchill Livingstone; 2005:1124-1126. |