20Developmental anomalies Structural developmental anomalies primarily affecting one body system Structural developmental anomalies of the urinary system LB31Structural developmental anomalies of urinary tract
LB31.0
category
Congenital hydronephrosis
Definition Congenital hydronephrosis is a renal urinary disease characterised by distension and dilation of the renal pelvis and calyces secondary to various congenital obstructive malformations of the kidneys and urinary tract that can evolve to renal atrophy.
Also indexed as
Congenital hydronephrosis Congenital primary hydronephrosis Congenital primary hydronephrosis, bilateral Congenital primary hydronephrosis, unilateral Congenital secondary hydronephrosis Congenital secondary hydronephrosis, bilateral Congenital secondary hydronephrosis, unilateral congenital hydrocalycosis congenital hydroureteronephrosis
Nearby in Structural developmental anomalies of urinary tract
International Classification of Diseases, Eleventh Revision (ICD-11), World Health Organization (WHO) 2019/2021, https://icd.who.int/browse11. Licensed under Creative Commons Attribution-NoDerivatives 3.0 IGO (CC BY-ND 3.0 IGO).
Release 2026-01.
View this entity in the official WHO ICD-11 browser .
This page reproduces WHO classification content for reference. It is not
medical advice and must not be used to diagnose or treat. For coding
decisions, consult the official release and your national coding guidelines.
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