LB31.B

ICD-11 MMS 2026-01

Malposition of ureter

Description

A condition caused by failure of the ureter to correctly develop during the antenatal period, resulting in partial or complete duplication of the ureter. This condition may present with hydronephrosis, urinary tract infection, or incontinence in females. Confirmation is through observation of an incorrectly positioned ureter by imaging.

Index terms

  • Malposition of ureter
  • Displacement of ureter or ureteric orifice
  • anomalous implantation of ureter or ureteric orifice
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  • Ectopic ureter or ureteric orifice
  • ectopia of ureter
  • ectopic ureter
  • Congenital deviation of ureter
  • deviation of ureter
  • deviation of ureter or ureteric orifice
  • Postcaval ureter
  • retrocaval ureter

Exclusions from above levels

  • http://id.who.int/icd/entity/733825440 – Inborn errors of metabolism

Sibling codes

  • LB31.0 – Congenital hydronephrosis
  • LB31.1 – Congenital primary megaureter
  • LB31.2 – Fetal lower urinary tract obstruction
  • LB31.3 – Exstrophy of urinary bladder
  • LB31.4 – Congenital diverticulum of urinary bladder
  • LB31.5 – Duplication of urethra
  • LB31.6 – Congenital megalourethra
  • LB31.7 – Megacystis-megaureter
  • LB31.8 – Atresia or stenosis of ureter
  • LB31.9 – Agenesis of ureter
  • LB31.A – Duplication of ureter
  • LB31.C – Congenital absence of bladder or urethra
  • LB31.D – Congenital vesico-uretero-renal reflux
  • LB31.Y – Other specified structural developmental anomalies of urinary tract
  • LB31.Z – Structural developmental anomalies of urinary tract, unspecified

Foundation entity

Malposition of ureter – http://id.who.int/icd/entity/646645493

Allowed postcoordination axes

Part of: LB31: Structural developmental anomalies of urinary tract › 20: Developmental anomalies