Anal transitional zone adenocarcinoma following restorative proctocolectomy for ulcerative colitis: case report and review of literature.

Conservative proctocolectomy with ileal pouch-anal anastomosis (IPAA) has become the intervention of choice for severe ulcerative colitis (UC) requiring surgery. Sporadically, the occurrence of carcinoma arising in or near the ileo-anal pouch after IPAA for UC has been reported. This issue is of utmost importance as an endoscopic follow-up is mandatory also after the operation. The present paper reports a case of cancer which developed four years after proctocolectomy with IPAA in a young man suffering from UC. Moreover, the authors provide update (PubMed research) by literature review on this issue.