Late Diagnosis of Bilateral Choanal Atresia: A Case Report of a Nine-Year-Old Girl.

Bilateral choanal atresia is a surgical emergency because of the risk of neonate death from acute asphyxia if treatment is delayed. Its diagnostic confirmation is often endoscopic or CT scan and requires a search for associated malformations. We present the case of a nine-year-old girl who was referred to the ENT department with suspected adenoid pathology. Her medical history showed respiratory distress at birth treated as a neonatal infection. We suspected bilateral choanal atresia due to the absence of fogging on mirror test and failure to pass a 6Fr or 8Fr suction catheter through the nasal cavity into the nasopharynx. Facial CT confirmed the presence of bilateral mixed osteo-membranous choanal atresia. Transpalatal choanoplasty was successfully performed with pre and postoperative endoscopic examination. This clinical case adds to the limited literature on bilateral choanal atresia diagnosed long after birth, raising once again the lack of knowledge of choanal atresia by some health workers, emergency neonatal care, the mechanism of breathing in the newborn, and the management of this malformation. Transpalatal choanoplasty is a good alternative when technical conditions do not allow an endoscopic endonasal approach.