EC21.0

ICD-11 MMS 2026-01

Genetic defects of the hair shaft

Index terms

  • Genetic defects of the hair shaft
  • Genetic defects of the hair shaft with increased fragility
  • Monilethrix
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  • Beaded hair
  • Pili torti
  • Twisted hair
  • Genetic defects of the hair shaft without increased fragility
  • Uncombable hair syndrome
  • Cheveux incoiffables
  • Pili trianguli et canaliculi
  • Spun-glass hair
  • Woolly hair
  • Pseudomonilethrix
  • Pili annulati
  • Ringed hair
  • Loose anagen syndrome
  • Loose anagen hair syndrome
  • Genetic abnormalities of hair colour
  • Familial premature canities
  • Familial premature greying of the hair
  • Familial poliosis

Excludes

  • 5C64.0Y – Menkes' kinky hair syndrome

Sibling codes

  • EC21.1 – Genetic syndromes with abnormalities of the hair shaft
  • EC21.2 – Hereditary alopecia or hypotrichosis
  • EC21.3 – Genetic syndromes with alopecia or hypotrichosis
  • EC21.4 – Genetically-determined hypertrichosis
  • EC21.Y – Other specified genetic defects of hair or hair growth
  • EC21.Z – Genetic defects of hair or hair growth, unspecified

Foundation entity

Genetic defects of the hair shaft – http://id.who.int/icd/entity/1838547056

Part of: EC21: Genetic defects of hair or hair growth › 14: Diseases of the skin