LB95

ICD-11 MMS 2026-01

Patella aplasia or hypoplasia

Description

Isolated patella aplasia-hypoplasia is an extremely rare genetic condition characterised by congenital absence or marked reduction of the patellar bone. This condition may present with discomfort or abnormal gait. Confirmation is through verification of the reduced or absent patella by imaging

Index terms

  • Patella aplasia or hypoplasia
  • Rudimentary patella
  • Patella aplasia or hypoplasia, unilateral
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  • Patella aplasia or hypoplasia, bilateral

Exclusions from above levels

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

Sibling codes

  • LB70 – Structural developmental anomalies of cranium
  • LB71 – Structural developmental anomalies of facial bones
  • LB72 – Structural developmental anomalies of shoulder girdle
  • LB73 – Structural developmental anomalies of spine or bony thorax
  • LB74 – Structural developmental anomalies of pelvic girdle
  • LB75 – Brachydactyly
  • LB76 – Triphalangeal thumb
  • LB77 – Hyperphalangy
  • LB78 – Polydactyly
  • LB79 – Syndactyly
  • LB90 – Joint formation defects
  • LB91 – Congenital shoulder dislocation
  • LB92 – Congenital elbow dislocation
  • LB93 – Congenital knee dislocation
  • LB94 – Congenital patella dislocation
  • LB96 – Congenital bowing of long bones
  • LB97 – Limb overgrowth
  • LB98 – Congenital deformities of feet
  • LB99 – Reduction defects of upper limb
  • LB9A – Reduction defects of lower limb
  • LB9B – Reduction defects of upper and lower limbs
  • LB9Y – Other specified structural developmental anomalies of the skeleton
  • LB9Z – Structural developmental anomalies of the skeleton, unspecified

Foundation entity

Patella aplasia or hypoplasia – http://id.who.int/icd/entity/88577362

Allowed postcoordination axes

Part of: 20: Developmental anomalies