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About duplex kidney
Duplex kidney is another term for ureteral duplication. This is where a child has 2 ureters (instead of one) connected to a single kidney. The extra ureter may be completely separate (this is called complete duplication), or start separately but combine with the original ureter before it attaches to the bladder (this is called incomplete duplication).
Ureters are the tubes that run down from each kidney to the bladder.
How common is duplex kidney?
Urinary tract differences are rare, but the most common type is duplex kidney, which affects around 0.8% of the population. The majority of children with this condition have no symptoms and do not experience any related problems, so both the child and parents are very often unaware of the condition.
What are the symptoms of duplex kidney?
While many children with duplex kidney may not have any symptoms at all, some may experience urinary tract infections (UTIs) or urinary incontinence.
Treatment of duplex kidney
In most cases, no treatment is needed. However, treatment may be considered depending on specific circumstances, such as:
- Your child’s age.
- Your child’s symptoms.
- How their urine flows.
- Their kidney function.
- Their medical history.
Kidney function means how well your kidneys are working in their job to clear waste products from the body. Kidney function is assessed with urine or blood tests.
Your medical history is the record that is kept of all of your vaccinations, past illnesses, family health history, your visits to your doctor, and any medicines that have been prescribed to you.
This chapter contains general information about duplex kidney (ureteral duplication). 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: April 2025