A newborn has severe nasal obstruction since birth. CT shows narrowing of the bony nasal inlet with a single large midline maxillary incisor. Which congenital anomaly is present?

• A Bilateral choanal atresia
• B Congenital nasal pyriform aperture stenosis ✓
• C Nasal dermoid cyst
• D Antrochoanal polyp

Explanation

Congenital pyriform aperture stenosis is overgrowth of the nasal process of the maxilla narrowing the pyriform aperture, and its pathognomonic marker is a solitary median maxillary central incisor. In choanal atresia the obstruction is posterior at the choanae and teeth are normal, so the incisor finding kills that distractor. Antrochoanal polyp does not occur in neonates.

Reference: Scott-Brown's Essential Otorhinolaryngology, 2nd ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

Written and medically reviewed by the StethoPrep medical team.