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Definition
By Mayo Clinic staffLeukemia is cancer of your body's blood-forming tissues, including your bone marrow and lymphatic system. It usually starts in your white blood cells.
Your white blood cells are potent infection fighters — they normally grow and divide in an orderly way, as your body needs them. But in leukemia, your bone marrow produces a large number of abnormal white blood cells, which don't function properly. Leukemia isn't just a children's disease. It has four main types and many subtypes — and only some are common among children.
A diagnosis of leukemia can cause you a great deal of concern, and treatment can be complex — varying on the type of leukemia and other factors. But there are strategies and resources that may make your road easier.
