What is anal cancer?

Aggressive cancer : Anal cancer is an aggressive cancer of the anal area. It is not a common cancer. Risk factors include a history of anal warts, cigarette smoking, HIV infection and lowered immunity. In early stages it can be treated by surgery but often requires treatment with chemotherapy and radiotherapy.

Cancer of the anus: Is usually a squamous type or arising from skin cells: totally different etiology/cause from colon and rectal cancer and managed differently than either of the latter.