Very Diff. Cancers
As close as these 2 areas are on the body, the cancers are quite different.
Ca of the anus is an aggressive type of skin cancer
that, when caught early, responds very well to chemo- and radiation therapy
; surgery is rarely needed. Ca of the rectum is very similar to colon
ca, arising from the inner intestinal lining; surgery is the main treatment, often preceded by chemo and radiation.