Polyps are growths that develop in the colon or large intestine, and in other parts of the body as well. They have a variety of sizes and appearances. When small, they may look like a wart, whereas they may grow to look like a cherry on a stem. Some polyps may turn into cancer. A person may have a single or multiple polyps. Polyps greater than 1 centimeter generally have a greater risk of becoming cancer. Polyps and colorectal cancer occur much more in industrialized western societies. Polyps are more likely to develop in persons who have low fruits and vegetables in their diets, also called diets with low fiber. Polyps are also more likely to occur in people who smoke more than a pack of cigarettes a day.