title: Paranasal sinus development and choanal atresia.
abstract: BACKGROUND
  Although the determinates of paranasal sinus development and sinusitis are not well defined, a candidate factor is blockage of the choana.
  
  
  OBJECTIVE
  Maxillary sinuses ipsilateral to unilateral choanal atresia are comparatively small and have more evidence of sinusitis than do the contralateral sinuses.
  
  
  METHODS
  Retrospective.
  
  
  METHODS
  Children's hospitals.
  
  
  METHODS
  Sixteen nonsyndomic children with isolated unilateral congenital choanal atresia.
  
  
  METHODS
  Determination of maxillary sinus volumes and mucoperiosteal thickening on preoperative computed tomograms.
  
  
  RESULTS
  Maxillary sinuses ipsilateral to unilateral choanal atresia have slightly larger volumes than, and mucoperiosteal thickening that is similar to, the contralateral sinuses.
  
  
  CONCLUSIONS
  These data suggest that maxillary sinus development and sinusitis are independent of posterior nasal ventilation and drainage.
authors.affiliation: Department of Otolaryngology, Emory University School of Medicine, Atlanta, GA 30322, USA.
authors.forename: P M
authors.initials: PM
authors.lastname: Behar
authors.forename: N W
authors.initials: NW
authors.lastname: Todd
mesh_terms: D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D002754:Choanal Atresia / Q000000981:diagnostic imaging / Q000473:pathology*; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D008443:Maxillary Sinus / Q000000981:diagnostic imaging / Q000473:pathology*; D012189:Retrospective Studies; D014057:Tomography, X-Ray Computed