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Unformatted text preview: is the excessive, uncontrolled production of white blood cells. Leukaemia is classified according to the speed at which it develops and the type of cells affected. There are four main types of leukaemia:- Acute Myeloid Leukaemia (AML) Acute Lymphoblastic Leukaemia (ALL) Chronic Myeloid Leukaemia (CML) Chronic Lymphocytic Leukaemia (CLL) The development of blood cells is genetically controlled and some genetic abnormalities are thought to contribute to leukaemia. The abnormal Philadelphia chromosome is associated with 95% of cases of CML. Usually there is no obvious cause, although certain risk factors have been indentified:- Certain viral infections (Human T-lymphotropic virus) Certain chemical and drugs Radiation exposure...
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- Fall '10