We report a case that an ileo-ileal fistula in the pelvis due to Crohn's disease adhered to the rectum, formed an abscess, and resulted in multiple nodular protrusion in the rectum resembling phlegmonous colitis. In Crohn's disease, inflammation of the ileum may spread to the pelvis and form cystic or rectal fistulas. It was considered a rare endoscopic finding that could be seen in Crohn's disease.
