Colon, rectal, and anal cancer management

Abstract

Adenomas are the most common neoplasms in the large bowel. They are classified into three types-tubular, tubulovillous, and villous-according to the histologic appearance. Tubular adenomas account for 75% of polyps found, tubulovillous adenomas account for 25%, and villous adenomas account for 10%. The malignancy rate of tubular adenomas is about 5%, but it rises to about 40% in villous adenomas. The entire colon should be examined if a histologically proven adenoma has been removed from the colon or is found on endoscopic biopsy. Endoscopic removal of polyps should be performed to confirm the diagnosis of a benign or malignant polyp.4 Polyps with a stalk can be removed by endoscopic snare polypectomy. Judgment must be used to assess the practicality of attempting endoscopic removal of sessile polyps, especially in the relatively thinwalled abdominal colon. © 2006 Springer Science+Business Media, Inc.