Prolapsing neoplasms of the terminal ileum simulating enlarged ileocecal valves.

Prolapsing and/or intussuscepting neoplasms of the terminal ileum are an uncommon cause of a prominent ileocecal valve as seen on a barium enema. Because of their varying position, these lesions require several spot films with reflux into the terminal ileum for their detection and accurate diagnosis. Five cases are described and illustrated, four lipomas and one carcinoid.