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.
Treatment of relapsed or refractory hairy cell leukemia may include the following: 1  Chemotherapy. 2  Biologic therapy. 3  Targeted therapy with a monoclonal antibody (rituximab). 4  High-dose chemotherapy. 5  A clinical trial of a new biologic therapy. 6  A clinical trial of a new targeted therapy.