Choanal atresia: current concepts and controversies.
OBJECTIVE
Choanal atresia is a common and widely recognized craniofacial disorder characterized by obliteration of the posterior nasal aperture. Given the long time since its original description, controversy persists regarding pathogenesis and optimal surgical techniques. This review addresses current literature on choanal atresia and identifies areas of debate and future opportunities in research.


RESULTS
Recent molecular mechanisms in retinoic acid receptor development have been described in the pathogenesis of choanal atresia. Whereas surgical treatment is generally believed to be effective in alleviating respiratory symptoms, consistent data confirming efficacy are scarce regarding best surgical approach with and without endoscopic sinus techniques, adjuvant use of stents, use of antiproliferative agents and laser-assisted surgery. Recent studies regarding each technique are discussed.


CONCLUSIONS
Despite vigorous research, the pathogenesis remains elusive and unproven. Many surgical techniques have been advocated; however, there is no dominant approach. Trends in treatment are directed towards the use of highly advanced endoscopic approaches with the use of microdebriders, small drill bits and telescopes to minimize traumatic injury that leads to postoperative scarring and restenosis.
Corrales
C Eduardo
CE
Division of Pediatric Otolaryngology, Stanford University, Stanford, California 94305, USA.
Koltai
Peter J
PJ
D002754:Choanal Atresia / Q000601:surgery*; D006801:Humans; D015607:Stents