EC21.2

ICD-11 MMS 2026-01

Hereditary alopecia or hypotrichosis

Description

Genetically-determined absence or sparsity of hair.

Index terms

  • Hereditary alopecia or hypotrichosis
  • Atrichia congenita
  • Alopecia universalis congenita
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  • Atrichia with keratin cysts
  • Atrichia with papular lesions
  • Hereditary generalised hypotrichosis
  • Hypotrichosis 1 (MIM605389)
  • generalised hypotrichosis simplex
  • Hereditary hypotrichosis of scalp
  • Hypotrichosis 2
  • Hypotrichosis simplex of scalp
  • Marie Unna congenital hypotrichosis
  • HYPT4 - [Hypotrichosis ] (MIM 146550)
  • Hypotrichosis 4 (MIM 146550)
  • Marie Unna hypotrichosis
  • Ciliary or superciliary hypotrichosis

Sibling codes

  • EC21.0 – Genetic defects of the hair shaft
  • EC21.1 – Genetic syndromes with abnormalities of the hair shaft
  • 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

Hereditary alopecia or hypotrichosis – http://id.who.int/icd/entity/384451022

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