Polyp: A mass of tissue that develops on the inside wall of a hollow organ, such as the colon. SLIDESHOW Super Tips to Boost Digestive Health: Bloating, Constipation, and More See Slideshow From Digestive Disorders Resources What Is Exocrine Pancreatic Insufficiency?Basics About Crohn's You Should KnowHow Ulcerative Colitis Affects Your Colon Featured Centers Good and Bad Foods for PsoriasisVideo: Getting Personal on Life With MS Health Solutions From Our Sponsors Shot-Free MS Treatment Your Child and COVID-19