| choanal atresia |
congenital bony or membranous occlusion of one or both choanae, due to failure of the embryonic bucconasal membrane to rupture. Cf. atretorrhinia.
출처: www.mercksource.com/pp/us/cns/cns_hl_dorlands.jspz...
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|---|---|
| choanal atresia |
Atresia of nares (anterior) (posterior) Congenital stenosis of nares (anterior) (posterior)
출처: icd9cm.chrisendres.com/index.php
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