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Hairy Cell Leukemia (HCL)

Hairy Cell Leukemia (HCL) is a rare, slow-growing cancer of the blood in which your bone marrow makes too many B cells (lymphocytes), a type of white blood cell that fights infection. This type of low-grade non-Hodgkin lymphoma gets its unusual name because the surface of the cancerous lymphocytes looks ruffled and hairy under the microscope.

Learn more about the signs and symptoms