Choanal atresia.
D000402:Airway Obstruction / Q000601:surgery; D004947:Esophagus; D006801:Humans; D007231:Infant, Newborn; D007440:Intubation; D009296:Nasal Cavity / Q000002:abnormalities* / Q000601:surgery; D009305:Nasopharynx / Q000002:abnormalities* / Q000601:surgery; D010159:Palate / Q000601:surgery