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.
About Hairy Cell Leukemia. Hairy cell leukemia (HCL) is a chronic leukemia. It is. caused by an abnormal change in a B lymphocyte (a. type of white blood cell). The disease is called hairy cell. leukemia because the leukemic lymphocytes have short, thin projections on their surfaces that look like hairs when. examined under a microscope.