Adenocarcinoma of an ileal conduit developing 8 years after cystoprostatectomy for locally advanced prostate carcinoma.

A 70-year-old patient was treated in September 2017 for a malignancy in an ileal conduit (IC) which he received in 2009 for the treatment of prostate cancer. The tumour was found incidentally during a routine sonography. A CT scan revealed a mass near the IC. An endoscopy with biopsies showed an intraepithelial neoplasia of the ileal mucosa in the IC. We performed a segmental ileal resection. Histological findings revealed an ileal adenocarcinoma. The postoperative course was uneventful. The patient has remained alive without tumour recurrence up to the most recent negative CT screening in April 2019. Secondary malignancies after urinary diversions are a well-known complication, including procedures using small bowel parts for the urinary diversion. Adenocarcinomas arising in an IC are rarely described in literature. Concerning said tumour entity, surgical removal is often recommended. There is no evidence for the success of chemotherapy or radiation due to insufficient clinical trials. When diagnosing a mass in an IC, a secondary malignancy should be taken under consideration.