LD55

ICD-11 MMS 2026-01

Fragile X chromosome

Description

Fragile X syndrome is a rare genetic disease associated with mild to severe intellectual deficit that may be associated with behavioural disorders and characteristic physical features.

Index terms

  • Fragile X chromosome
  • FRAXA - fragile x syndrome
  • Fragile X syndrome
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  • Martin-Bell syndrome
  • marker X syndrome

Inclusions

  • Fragile X syndrome

Exclusions from above levels

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

Sibling codes

  • LD50 – Number anomalies of chromosome X
  • LD51 – Structural anomalies of chromosome X, excluding Turner syndrome
  • LD52 – Number anomalies of chromosome Y
  • LD53 – Structural anomalies of chromosome Y
  • LD54 – Male with sex chromosome mosaicism
  • LD56 – Chimaera 46, XX, 46, XY
  • LD5Y – Other specified sex chromosome anomalies
  • LD5Z – Sex chromosome anomalies, unspecified

Foundation entity

Fragile X chromosome – http://id.who.int/icd/entity/1524287677

Part of: 20: Developmental anomalies