PT - JOURNAL ARTICLE AU - A Bignault AU - M Castillo TI - Congenital nasal piriform aperture stenosis. DP - 1994 May 01 TA - American Journal of Neuroradiology PG - 877--878 VI - 15 IP - 5 4099 - http://www.ajnr.org/content/15/5/877.short 4100 - http://www.ajnr.org/content/15/5/877.full SO - Am. J. Neuroradiol.1994 May 01; 15 AB - A 3-1/2-month-old girl presented with respiratory difficulty secondary to nasal obstruction. CT demonstrated stenosis of the nasal piriform aperture. The presentation of this entity is similar to that of posterior choanal atresia.