(HCL; Leukemic Reticuloendotheliosis)
Hairy cell leukemia – Definition
Hairy cell leukemia (HCL) is a rare form of cancer. It involves white blood cells called B lymphocytes. White blood cells protect the body from infection. HCL gets its name from the tiny hair-like projections that protrude from the surface of these cancer cells. Illness results from the accumulation of these cancer cells in the bone marrow and spleen.