[One clip too many]. / Ein Clip zu viel.

ABSTRACT

A patient with a Mainz II pouch due to muscle invasive bladder cancer presented to our urology department with de novo hydronephrosis on the left kidney after a regular colonoscopy. In the course of diagnostic workup, it was found that the neo-ostia were removed and clipped as a "polyp". Via rendezvous technique of antegrade ureterenoscopy and colonoscopy after nephrostomy placement urine outflow was successfully reconstituted by inserting a biliary stent into the left neo-ostium, which consolidated after stent removal as a permanent state.