Hairy cell leukemia
Hematological malignancy / From Wikipedia, the free encyclopedia
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Hairy cell leukemia is an uncommon hematological malignancy characterized by an accumulation of abnormal B lymphocytes.[1] It is usually classified as a subtype of chronic lymphocytic leukemia (CLL). Hairy cell leukemia makes up about 2% of all leukemias, with fewer than 2,000 new cases diagnosed annually in North America and Western Europe combined.
Hairy cell leukemia (HCL) was originally described as histiocytic leukemia, malignant reticulosis, or lymphoid myelofibrosis in publications dating back to the 1920s. The disease was formally named leukemic reticuloendotheliosis, and its characterization was significantly advanced by Bertha Bouroncle and colleagues at the Ohio State University College of Medicine in 1958. Its common name, which was coined in 1966,[2] is derived from the "hairy" appearance of the malignant B cells under a microscope.[3]