There are several types of sessile polyps. These include sessile serrated adenomas, villous adenomas, tubular adenomas, and tubulovillous adenomas. Sessile polyps may be benign or cancerous.

Figure 5. Typical appearance of a sessile serrated adenoma/polyp in the ascending colon. Arrows indicate the indistinct upper edge of this flat, pale lesion. 1 Division of Gastroenterology and ...

Adenomas and sessile serrated polyps that are 10 mm or more are classified as advanced. The risk that a polyp will become ...