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©2013 UpToDate ® Print Email Anatomic section of choanal atresia Anatomic section of bilateral choanal atresia, the obliteration or blockage of the posterior nasal aperture. *: choanae, u: uvula. Courtesy of Glenn C Isaacson, MD, FAAP, FACS.
©2013 UpToDate ® Print Email Anatomic section of choanal atresia Anatomic section of bilateral choanal atresia, the obliteration or blockage of the posterior nasal aperture. *: choanae, u: uvula. Courtesy of Glenn C Isaacson, MD, FAAP, FACS. Endoscopic view of choanal atresia mt: middle turbinate; it: inferior turbinate; ns: nasal septum; a: atresia "plate". Courtesy of Glenn C Isaacson, MD, FAAP, FACS.