I want to know about duplex kidney

A duplex kidney, also called ureteral duplication, means one kidney has two drainage tubes (ureters) instead of one. This page explains what it is, how it’s diagnosed, and treatment options.

This chapter contains general information about duplex congenital malformations of the urinary tract. If you have any specific questions you should consult your doctor or other professional healthcare provider. No website or leaflet can replace a personal conversation with your doctor.

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)