Congenital Atresia of the Posterior Nares

Ausência de fluxo aéreo nasal e desenvolvimento dos seios maxilares

“…Four other studies published in the literature corroborate these findings 10,16,17,18 , none of them was carried out in our country. We still require further studies, with larger series, in order to validate such statements.…”

Absence of nasal air flow and maxillary sinus development.

“…The cases hereby studied suggest that the posterior nasal airflow did not have any crucial role in the sinus development of these patients, contrary to the theory broadly accepted about paranasal cavities' development. Four other studies published in the literature corroborate these findings 10 , 16 , 17 , 18 , none of them was carried out in our country. We still require further studies, with larger series, in order to validate such statements.…”

“…Descriptions of choanal atresia patients bearing healthy and well developed nasal sinuses are not recent. In 1931 Stewart 18 reported 3 cases of choanal atresia with broad bilateral sinuses development. Klossek et al 19 and Diner et al 10 showed in two series (6 and 11 patients) a symmetrical development of the paranasal sinuses in patients with characteristics similar to those of our study.…”

Paranasal Sinus Development and Choanal Atresia

“…Proetz 6 observed that newborns with bilateral choanal atresia do not have clinical infection of the maxillary sinuses. Stewart's 22 1931 report included the radiographs of 3 patients with unilateral choanal atresia: "The air sinuses on both sides of the skull were found to be well developed." Mehta, 4 in describing an adult with unilateral choanal atresia, reported near-symmetrical, aer-…”