Anal CancerThe anus is the name for the muscular area at the very end of the large bowel. It is the muscle which opens and closes to control bowel movements, and is where the bowel opens to the outside of the body. This muscle is also called a sphincter. The most common type of anal cancer is squamous cell. Other, rarer types are basal cell, adenocarcinoma and melanoma. This section deals with the treatment of squamous cell carcinoma.  |