n SA Journal of Radiology - Unilateral membranous choanal atresia : pictorial interlude

Volume 15, Issue 1
  • ISSN : 1027-202X
  • E-ISSN: 2078-6778



Images of a case of unilateral choanal atresia diagnosed in a 35-year-old woman are presented. This is an uncommon diagnosis in an adult patient, and a less frequently encountered form of the condition. In more than 90% of cases of choanal atresia, the abnormality is partly or completely osseous; pure membranous atresia is rare. It is unilateral in 50 - 60% of cases, and more than 75% are associated with syndromes and systemic anomalies.

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