Choanal atresia

• Facts:
  Most common nasal malformation
  Congenital disorder where the back of the nasal passage is blocked
  May be isolated or part of a dysmorphic syndrome
• History / PE:
  Cyanosis aggravated with feeding, relieved by crying
• Diagnosis:
  Failure to pass catheter through nose 3-4cm into oropharynx
  CT scan with intranasal contrast
• Differential Diagnosis:
  Laryngomalacia (inspiratory stridor)