We report a case, in which 5 years after a caecocystoplasty (Mainz-Pou
ch), an adenocarcinoma of the colon was found in the cecal-part of the
reservoir and in the anastomosis of the ileoascendostomy. Treatment w
as resection of the tumor en bloc, together with the distal ureters, f
ollowed by antirefluxive reimplantation in the remaining cystoplasty a
nd ileotransversostomy (end-to-end).