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.
What causes carcinoma cancer? WebMD reports that ultraviolet rays from the sun or from a tanning bed are the primary cause of basal cell carcinoma. Tumors vary widely in appearance and include small shiny bumps, patches of red, slightly scaly skin and waxy, hard growths.