Cancer of the Anus and Rectum
Anal cancer is account for 2% of cancer in the gastrointestinal tract. Anal or rectal cancer generally do not produce any pain; an external or internal mass may be palpable. Some lesions are so soft that they are missed on palpation. Anal cancers are staged and treated differently from rectal cancers. Anal cancer can take several forms including ulcers, polyps or verrucous growths; treatment is typically a combination of surgery, chemotherapy and pelvic radiation.