Congenital choanal atresia.
D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D008875:Middle Aged; D009305:Nasopharynx / Q000002:abnormalities*; D009666:Nose / Q000002:abnormalities*; D009667:Nose Deformities, Acquired; D012220:Rhinitis / Q000209:etiology; D012852:Sinusitis / Q000209:etiology