A Comparative Study of Endoscopic Choanal Canalization and Mitomycin C Application vs Endoscopic Crossover Flap Technique

"* Performed under general anesthesia.~* Nasal cavities decongested with oxymetazoline.~* Atretic plate perforated using serial dilators under direct visualization.~* Additional removal of bony/membranous tissue including the posterior nasal septum as possible.~* Topical mitomycin C (0.5 mg/mL) applied to the edges of the newly created choana for 2 minutes using cotton pledget in a transparent tube , followed by irrigation with saline.~* syndromatic patients and patients requiring less time UGA will be included in this group"

"* Performed under general anesthesia using a 0° 4 mm endoscope.~* Elevation of mucosal crossover flaps to cover exposed bone following resection of the atretic plate where one flap is inferiorly based and the other is superiorly based.~* Precise removal of the posterior vomer and lateral bony plates as needed using cold steel instruments and possible nasal drill.~* Flaps will be repositioned to minimize exposed bone and promote mucosal healing preventing restenosis."