Leukemia is a type of cancer that starts in the blood or blood-forming tissues. There are many different types of leukemia, and treatment is different for each one. Chronic leukemias are slower growing than acute leukemias, but can be just as life threatening.

Chronic myelogenous leukemia is commonly referred to as CML. Other names for this type of cancer include chronic myeloid leukemia, chronic myelocytic leukemia, and chronic granulocytic leukemia.