Embolisation: A surgical procedure used to slow the growth or destroy cancer cells by blocking the blood supply to a tumor. The movement of a blood clot, piece of tissue, or pocket of air or gas from where it forms through the bloodstream until it lodges in place cutting off the flow of blood with its oxygen and tissue nutrients. Catheter embolisation is the deliberate introduction of foreign ("embolic") material such as gelatin sponge or metal coils to stop bleeding or cut off blood flowing to a tumor or arteriovenous malformation.

Enucleation: The removal of an organ or tumor so that it comes out whole.

Epidural Block: Often used for pain relief. It is an injection of an anesthetic drug into the space between the wall of the spinal canal and spinal cord (epidural space)

Epithelial: Type of cell that lines the internal and external organs of the body.

Epithelial Carcinoma: Cancer that begins in the cells that line that particular organ. (many RCC tumors begin in the epithelial cells)

ESR (Erthyrocyte Sediment Rate): A blood test that indicates inflammation, cancer, rheumatoid diseases, diseases of the blood and bone marrow. (the distance that red blood cells travel in an hour and settle in the bottom of a test tube)

Erythropoietin: A substance that is naturally produced by the kidneys, it stimulates the bone marrow to make red blood cells. It can be made in the laboratory and is called epoetin alfa or epeotin beta.

Exophytic: A tumor that is growing outward.

Excisional Biopsy: A surgical procedure in which an entire lump or suspicious area is removed for diagnosis. The tissue is examined under a microscope.