Acute Lymphoblastic Leukemia in Children National Cancer Institute Key Points * Acute lymphoblastic leukemia (ALL) is a cancer of the white blood cells, the cells in the body that normally

Chronic Lymphocytic Leukemia USATODAY.com Definition of Chronic Lymphocytic Leukemia Chronic Lymphocytic Leukemia is a malignancy (cancer) of excessive lymphocyte (a type of white blood cell) pro