LB62

ICD-11 MMS 2026-01

Supernumerary breasts

Description

A condition caused by failure of the breasts to correctly develop during the antenatal period. This condition is characterised by supernumerary breasts, with or without nipples. This condition may be asymptomatic.

Index terms

  • Supernumerary breasts
  • Accessory breast
  • breast of axilla
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  • polymastia

Exclusions from above levels

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

Sibling codes

  • LB60 – Breast aplasia
  • LB61 – Absent nipple
  • LB63 – Accessory nipple
  • LB6Y – Other specified structural developmental anomalies of the breast
  • LB6Z – Structural developmental anomalies of the breast, unspecified

Foundation entity

Supernumerary breasts – http://id.who.int/icd/entity/1458532658

Allowed postcoordination axes

Part of: 20: Developmental anomalies