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Article: Leukemias, Chronic
- Article from:
- Gale Encyclopedia of Children's Health: Infancy throughAdolescence
- Author:
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Leukemias, chronic
Definition
Chronic leukemia is a disease in which abnormal, cancerous white blood cells are made in the bone marrow. Depending on the type of white blood cell that is involved, chronic leukemia can be classified as chronic lymphocytic leukemia or chronic myeloid leukemia.
Description
Chronic leukemia is a
cancer
that starts in the blood cells made in the bone marrow. The bone marrow is the spongy tissue found in the large bones of the body. The bone marrow makes precursor cells called blasts or stem cells, which mature into different types of blood cells. Unlike
acute leukemias
, in which the process of maturation of the blast cells is interrupted, in chronic ...