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The appearance of the condition in both single and successive generations supports this contention.<\/jats:p><jats:p>Choanal atresia can occur as an isolated anomaly, but is more commonly associated with one or more concomitant congenital anomalies. In this report two sisters both in their teens presented with unilateral choanal atresia as an isolated anomaly. Endoscopic trans-nasal repair of choanal atresia was performed in both of them as this offers excellent visualisation and access.<\/jats:p>","DOI":"10.1017\/s0022215100134553","type":"journal-article","created":{"date-parts":[[2007,11,30]],"date-time":"2007-11-30T10:14:23Z","timestamp":1196417663000},"page":"665-667","source":"Crossref","is-referenced-by-count":10,"title":["Unilateral choanal atresia in siblings \u2013 a rare occurrence"],"prefix":"10.1017","volume":"110","author":[{"given":"Abir K.","family":"Bhattacharyya","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Valerie J.","family":"Lund","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"56","published-online":{"date-parts":[[2007,6,29]]},"reference":[{"key":"S0022215100134553_ref026","first-page":"569","article-title":"Congenital occlusion of the posterior choanae","volume":"11","author":"Wright","year":"1922","journal-title":"Lancet"},{"key":"S0022215100134553_ref013","doi-asserted-by":"publisher","DOI":"10.1016\/0165-5876(87)90107-8"},{"key":"S0022215100134553_ref020","first-page":"181","volume-title":"Anatomie des Menschen und der Thiere","volume":"1","author":"Otto","year":"1830"},{"key":"S0022215100134553_ref023","doi-asserted-by":"publisher","DOI":"10.1017\/S002221510006237X"},{"key":"S0022215100134553_ref005","doi-asserted-by":"publisher","DOI":"10.1016\/S0022-3476(87)80555-3"},{"key":"S0022215100134553_ref015","doi-asserted-by":"crossref","first-page":"167","DOI":"10.1016\/S0030-6665(20)32300-8","article-title":"Congenital choanal atresia","volume":"14","author":"Maniglia","year":"1981","journal-title":"Otolaryngologic Clinics of North America"},{"key":"S0022215100134553_ref019","doi-asserted-by":"publisher","DOI":"10.1001\/archotol.1993.01880130051006"},{"key":"S0022215100134553_ref003","doi-asserted-by":"publisher","DOI":"10.1288\/00005537-198702000-00008"},{"key":"S0022215100134553_ref002","doi-asserted-by":"publisher","DOI":"10.1016\/0165-5876(87)90089-9"},{"key":"S0022215100134553_ref022","doi-asserted-by":"publisher","DOI":"10.1016\/S0165-5876(86)80010-6"},{"key":"S0022215100134553_ref007","doi-asserted-by":"publisher","DOI":"10.1016\/0165-5876(88)90063-8"},{"key":"S0022215100134553_ref010","doi-asserted-by":"publisher","DOI":"10.1016\/S0165-5876(85)80084-7"},{"key":"S0022215100134553_ref001","doi-asserted-by":"publisher","DOI":"10.1177\/000348948509400501"},{"key":"S0022215100134553_ref004","doi-asserted-by":"publisher","DOI":"10.1017\/S0022215100129172"},{"key":"S0022215100134553_ref024","doi-asserted-by":"publisher","DOI":"10.1001\/archotol.1942.00670010608008"},{"key":"S0022215100134553_ref025","doi-asserted-by":"publisher","DOI":"10.1177\/019459989010300608"},{"key":"S0022215100134553_ref009","doi-asserted-by":"publisher","DOI":"10.3109\/00016486609119564"},{"key":"S0022215100134553_ref006","doi-asserted-by":"publisher","DOI":"10.1016\/S0165-5876(86)80071-4"},{"key":"S0022215100134553_ref017","doi-asserted-by":"publisher","DOI":"10.1002\/ajmg.1320260311"},{"key":"S0022215100134553_ref014","doi-asserted-by":"publisher","DOI":"10.1002\/ajmg.1320370303"},{"key":"S0022215100134553_ref008","first-page":"461","article-title":"Choanal atresia","volume":"60","author":"Evans","year":"1971","journal-title":"Journal of Laryngology and Otology"},{"key":"S0022215100134553_ref011","doi-asserted-by":"publisher","DOI":"10.1007\/BF00540250"},{"key":"S0022215100134553_ref018","doi-asserted-by":"publisher","DOI":"10.1016\/0165-5876(90)90191-S"},{"key":"S0022215100134553_ref012","first-page":"970","article-title":"Ueber choanatresie (Hereditaet derselben)","volume":"46","author":"Lang","year":"1912","journal-title":"Monatsschrift fur Ohrenheilk unde und Laryngo-Rhinologie"},{"key":"S0022215100134553_ref021","first-page":"143","article-title":"Congenital occlusion of the choanae","volume":"35","author":"Phelps","year":"1926","journal-title":"Annals of Otology, Rhinology and Laryngology"},{"key":"S0022215100134553_ref016","doi-asserted-by":"publisher","DOI":"10.1288\/00005537-196105000-00002"}],"container-title":["The Journal of Laryngology &amp; 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