Congenital nasal pyriform aperture stenosis: a rare cause of upper airway obstruction in newborn

Congenital nasal pyriform aperture stenosis (CNPAS) is a rare cause of upper airway (UA) obstruction in newborn. Although commonly described as arising from overgrowth of the nasal process of the maxilla, some authors defend that it results from medialisation of normally shaped maxilla.[1][1] It is