Transnasal endoscopic repair of choanal atresia

(A) Transnasal endoscopic view in an infant with choanal atresia showing blockage of the posterior nasal aperture (arrows).
(B) Endoscopic puncture of the membranous portion of the atresia plate.
(C) Resection of the atresia plate and posterior vomer to create a large, ovoid connection to the nasopharynx.