[A noteworthy case: An atypically located urachal cyst after continent urinary diversion using a MAINZ pouch with an appendix stoma]. / Ein bemerkenswerter Fall: Eine atypisch gelegene Urachuszyste nach kontinenter Harnableitung mittels MAINZ-Pouch mit Appendixstoma.

This case presents a 29-year-old man, with a urinary diversion via MAINZ Pouch I after cystectomy due to trauma in early childhood with a history of multiple previous surgeries. The reason for the presentation was a non-specific paraumbilical swelling on the right, which was disturbing for him. Despite further diagnostics by means of magnetic resonance imaging, a clear diagnosis of the subcutaneous tissue could not be made. After surgical removal of the complete cyst and after histological work-up, the diagnosis of an urachus-cyst could be made.