RT Book, Section A1 Doherty, Gerard M. SR Print(0) ID 58091991 T1 Anal Canal Cancer T2 Quick Answers Surgery YR 2010 FD 2010 PB The McGraw-Hill Companies PP New York, NY SN LK accesssurgery.mhmedical.com/content.aspx?aid=58091991 RD 2024/04/24 AB • Account for 1.5% of GI tract cancers• Usually long history of perianal complaints• Disease may be quite extensive at presentation• Associated with chronic anal infection (human papillomavirus)• Tumors anatomically found from the upper to lower border of the internal anal sphincter, 6-12 mm above dentate line• Referred to as epidermoid carcinoma