Learn about the three most important lines of latitude on Earth - the equator, Tropic of Cancer, and Tropic of Capricorn. Learn about the three most important lines of latitude on Earth - the equator, Tropic of Cancer, and Tropic of Capricorn.
General Discussion. Hairy cell leukemia (HCL) is a rare type of blood cancer characterized by abnormal changes in white blood cells known as B lymphocytes. The bone marrow creates too many of these defective cells, known as hairy cells because of the thin hair-like projections found on their surface.
Two chemotherapy drugs are used in hairy cell leukemia: 1  Cladribine. Treatment for hairy cell leukemia typically begins with cladribine. 2  Pentostatin (Nipent). Pentostatin causes remission rates similar to cladribine, but it's given on a different schedule.