LB90.3

ICD-11 MMS 2026-01

Radio-ulnar synostosis

Description

A condition caused by failure of the arm bones to correctly develop during the antenatal period. This condition is characterised by direct fusion of the ulnar and radial bones of the arm, and consequent limitation of rotational movement of the forearm. Confirmation is through observation of radio ulnar fusion by imaging.

Index terms

  • Radio-ulnar synostosis
  • Radio-ulnar synostosis, unilateral
  • Radio-ulnar synostosis, bilateral

Exclusions from above levels

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

Sibling codes

  • LB90.0 – Humero-radio-ulnar synostosis
  • LB90.1 – Humero-radial synostosis
  • LB90.2 – Humero-ulnar synostosis
  • LB90.4 – Madelung deformity
  • LB90.5 – Congenital digital clubbing
  • LB90.6 – Tibio-fibular synostosis
  • LB90.7 – Cubitus valgus
  • LB90.8 – Cubitus varus
  • LB90.Y – Other specified joint formation defects
  • LB90.Z – Joint formation defects, unspecified

Foundation entity

Radio-ulnar synostosis – http://id.who.int/icd/entity/1098526181

Allowed postcoordination axes

Part of: LB90: Joint formation defects › 20: Developmental anomalies