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Definition of Hairy cell leukemia

Hairy cell leukemia: A rare type of chronic leukemia in which the abnormal white blood cells appear to be covered with tiny hairs when examined microscopically. The hairy cells are malignant B lymphocytes. There may be too few normal blood cells of all types because of an exc

Source: MedTerms™ Medical Dictionary
Last Editorial Review: 3/30/2012

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