Choanal atresia usually presents in neonates. It is one of the commonest causes of nasal obstruction in neonates and infants. It is more commoner in females and unilateral. Unilateral choanal atresia present late and can be asymptomatic or present with rhinorrhea while bilateral atresias can present with neonatal respiratory distress. Osseous obstruction of the posterior choana is the most common type (90%).