What is a Colon Polyp?

Polyps are benign growths (noncancerous tumors or neoplasms) involving the lining of the bowel. They can occur in several locations in the gastrointestinal tract but are most common in the colon. They vary in size from less than a quarter of an inch to several inches in diameter. They look like bumps growing from the inside lining of the bowel protruding out. They sometimes grow on a stalk and look like mushrooms. Some polyps can be flat. People can have several polyps scattered in different parts of the colon. Some polyps can contain cancer, although the vast majority of polyps do not. Larger polyps are more likely to become cancerous than smaller ones.