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.
Where the bladder cancer begins determines the type of cancer. Most bladder cancers are caused by transitional cell carcinoma, which begins in the cells that line the bladder walls. Another type is squamous cell carcinoma, which begins in thin, flat cells and is caused by infection and irritation.