Tabriz University of Medical Sciences Medical Journal of Tabriz University of Medical Sciences 2783-2031 36 2 2014 06 05 Congenital Nasal Pyriform Aperture Stenosis (CNPAS): Report of one Case 98 101 EN Parisa Hajaliogly Mohammadamin Rezazadehsaatlou Zahra Shahmorady Masoud Gholamian Journal Article 2013 11 23 2014 01 08 Congenital Nasal Pyriform Aperture Stenosis (CNPAS) is an unusual cause of airway obstruction in the newborn and infants. CNPAS should be considered in the differential diagnosis of any infant with episodic apnea, cyclical cyanosis, and feeding difficulties. Computerized tomographic (CT) measurements and imaging features enable accurate diagnosis of this abnormality. In this report we demonstrated CT examination findings of CNPAS in a 9 –year-old girl.