EC21.1

ICD-11 MMS 2026-01

Genetic syndromes with abnormalities of the hair shaft

Index terms

  • Genetic syndromes with abnormalities of the hair shaft
  • Björnstad syndrome
  • Crandall syndrome
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  • Deafness - pili torti - hypogonadism
  • Trichothiodystrophy
  • Trichorrhexis nodosa syndrome
  • Pollitt syndrome
  • Trichothiodystrophy-neurocutaneous syndrome
  • Skin fragility-woolly hair syndrome
  • Desmoplakin deficiency
  • EBS-desmoplakin

Sibling codes

  • EC21.0 – Genetic defects 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 syndromes with abnormalities of the hair shaft – http://id.who.int/icd/entity/828383694

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