Leukemia

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Leukemia is a blood cancer where in certain white blood cells grow in an uncontrolled manner. The uncontrolled growth of the white blood cells harms the body in many ways. Useless white cells flood the tissue and blood. The bone marrow loses its ability to produce red blood cells and blood production is affected. This leads to anemia. People with leukemia may have an enlarged spleen and enlarged lymph glands. They also bleed easily.

There are at least three kinds of white blood cells in the body ; granulocytes, lymphocytes and monocytes. Leukemia may affect any of the three kinds. Doctors classify Leukemia according to the type of white blood cells affected. All kinds of leukemia can be either acute or chronic, without treatment, acute leukemia progresses rapidly and the patient may die within a few months. Chronic leukemia develops more slowly and may continue for many years.

Scientists do not know the exact cause of leukemia in human beings. They believe that certain chemicals, large doses of radiation and genetic disorders may contribute to the development of the disease viruses can cause leukemia in laboratory animals, and many researchers suspect that leukemia in humans may also be due to a virus.

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