Overview A GI polyp is defined as a mass of the mucosal surface protruding into the lumen of the bowel (see the images below). Polyps can be neoplastic, nonneoplastic, or submucosal. GI polyposis is characterized by multiple polyps within the GI tract. Preferred examination: The role of the radiologist in the diagnosis and evaluation of intestinal polyposis syndromes cannot be ... Read more