Unilateral choanal atresia in a young female.

Congenital choanal atresia is a rare anomaly with an incidence of one in five to ten thousand live births. It can be a bilateral or unilateral atresia; the former is a medical emergency while the later may remain unrecognized until later in life. Transpalatal or transnasal approaches are routinely followed for surgery with placement of stent or serial dilatations in the postoperative period.