Rare diseases · Sign or symptom
Renal duplication
Extra kidney
HP:0000075
What it means
A congenital anomaly of the urinary tract, in which the kidney is duplicated and is drained via two separate renal pelves and ureters.
Rare diseases that can present with this14
The range is how often this sign appears among people diagnosed with each disease — it is not a probability of having any of them. Many of these signs also occur in common, non-rare conditions. A sign on this page is a conversation to have with a clinician, not a conclusion.
Part of the broader category
Also called: Duplex kidney · Duplicated kidney · Supernumerary kidney
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Start free with EleplanThis page uses the Human Phenotype Ontology (2026-06-23) — Human Phenotype Ontology Consortium, hpo.jax.org. Disease associations from Orphanet (INSERM), CC BY 4.0. Content is educational and is not medical advice.