Duplex congenital malformations of the urinary tract

A duplex congenital malformation of the urinary tract means a person is born with two ureters instead of one draining a kidney. This page explains what it is, how it’s found, and what can help.

This chapter contains general information about duplex congenital malformations of the urinary tract. It is not a substitute for professional medical advice or treatment. Always consult your doctor or healthcare provider for guidance on your individual medical situation.

Last updated: July 2025

Reviewed by: 

  • Prof. Dr. Christian Radmayr (Guideline Panel on Paediatric Urology)
  • Assoc. Prof. Muhammet Irfan Dönmez (YAU Working Group on Paediatric Urology)