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.
Plasma cell leukemia (PCL) is a rare and aggressive form of cancer that may develop on its own, or from an existing case of multiple myeloma.CL and the related disease, multiple myloma, are cancers of the plasma cells. Plasma cells are a type of white blood cell that produces antibodies. When these abnormal plasma cells reproduce and cluster in the bones, they create lesions that can lead to fractures.