OBJECTIVE To assess the relationship between estimated residential maternal exposure to atrazine during pregnancy and the risk for choanal atresia or stenosis in offspring. STUDY DESIGN Data for 280 nonsyndromic cases and randomly selected, population-based controls delivered between 1999 and 2008 were obtained from the Texas Birth Defects Registry. County-level estimates of atrazine levels o...

Choanal atresia is caused by failure of resorption of the bucco-pharyngeal membrane during embryonic development. The atresia can be membranous or bony in nature, but is usually mixed in most cases. When the atresia is bilateral, newborns can have severe airway distress and cyanosis is alleviated by crying. Bilateral choanal atresia is managed with an oropharyngeal airway. Flexible nasal endosc...

INTRODUCTION AND OBJECTIVES Choanal atresia is the most common congenital nasal anomaly. Diagnosis is confirmed by endoscopic examination and computed tomography. The definitive treatment is surgical, and different surgical techniques and approaches are used. We describe our experience in transnasal microsurgical treatment of congenital choanal atresia. METHODS We retrospectively evaluated 49...

Objective. To illustrate the role of multislice computed tomography and local contrast instillation in the diagnosis and characterization of choanal atresia. To review the common associated radiological findings. Methods. We analyzed 9 pediatric patients (5 males and 4 females) with suspected choanal atresia by multislice computed tomography. We recorded the type of atresia plate and other cong...

BACKGROUND Although the determinates of paranasal sinus development and sinusitis are not well defined, a candidate factor is blockage of the choana. HYPOTHESIS Maxillary sinuses ipsilateral to unilateral choanal atresia are comparatively small and have more evidence of sinusitis than do the contralateral sinuses. DESIGN Retrospective. SETTING Children's hospitals. PATIENTS Sixteen nons...

We have treated a total of 15 patients (11 girls, 4 boys) for choanal atresia in the University Department of Otorhinolaryngology during a period of 15 years from 1963-1976. No other cases occurred in their families. One patients is mentally retarded, whereas none of the others have had other congenital defects. Five patients (4 girls, 1 boy) had bilateral choanal atresia. In all 5 cases, the b...