Congenital nasal pyriform aperture stenosis and single central maxillary incisor: CT and MRI findings.

The authors report five cases of congenital nasal pyriform aperture stenosis (CNPAS). Four cases are presented as neonatal nasal obstruction and also have single central maxillary incisor (SCMI). Computed tomography examination indicates three of the SCMI are unerupted and one is erupted. The fifth case has an erupted SCMI and short stature. The associated SCMI in CNPAS is believed to be more than an isolated anomaly. Awareness of the associated features of CNPAS among the radiologist and otolaryngologist may help the diagnosis and treatment of the patient.