Congenital choanal atresia. Twenty years' experience.
D002675:Child, Preschool; D005069:Evaluation Studies as Topic; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D009666:Nose / Q000002:abnormalities* / Q000000981:diagnostic imaging / Q000601:surgery; D011859:Radiography; D012225:Rhinoplasty / Q000295:instrumentation / Q000379:methods