title: Radiology quiz case 1. Congenital nasal pyriform aperture stenosis (CNPS).
authors.affiliation: Naval Medical Center Portsmouth, Portsmouth, Virginia, USA.
authors.forename: Timothy L
authors.initials: TL
authors.lastname: Clenney
authors.forename: Nicole K
authors.initials: NK
authors.lastname: McIntyre
authors.forename: David H
authors.initials: DH
authors.lastname: Darrow
mesh_terms: D000402:Airway Obstruction / Q000151:congenital* / Q000175:diagnosis; D003251:Constriction, Pathologic / Q000151:congenital; D003937:Diagnosis, Differential; D005260:Female; D005500:Follow-Up Studies; D016142:Holoprosencephaly / Q000175:diagnosis; D006801:Humans; D007091:Image Processing, Computer-Assisted; D021621:Imaging, Three-Dimensional; D007223:Infant; D007231:Infant, Newborn; D008279:Magnetic Resonance Imaging; D056144:Pyriform Sinus / Q000002:abnormalities*; D014057:Tomography, X-Ray Computed