Orphanet: Choanal atresia

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Choanal atresia

Disease definition

Choanal atresia (CA) is a congenital anomaly of the posterior nasal airway characterized by the obstruction of one (unilateral) or both (bilateral) choanal aperture(s), with clinical manifestations ranging from acute respiratory distress to chronic nasal obstruction.


Classification level: Disorder
  • Synonym(s): -
  • Prevalence: 1-9 / 100 000
  • Inheritance: Not applicable 
  • Age of onset: Childhood, Infancy, Neonatal
  • ICD-10: Q30.0
  • OMIM: 608911
  • UMLS: C0008297
  • MeSH: D002754
  • GARD: -
  • MedDRA: 10008587

Detailed information


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