During maxillary antrostomy, the surgeon notes an ethmoid air cell extending along the orbital floor above the infraorbital canal, projecting into the roof of the maxillary sinus and narrowing the infundibulum. This cell is called the:

• A Agger nasi cell
• B Onodi cell
• C Concha bullosa
• D Haller cell ✓

Explanation

The Haller cell, or infraorbital ethmoid cell, pneumatizes along the orbital floor beneath the lamina papyracea and projects into the maxillary sinus roof, where it can narrow the maxillary ostium and infundibulum and contribute to recurrent maxillary sinusitis. The agger nasi cell sits anteroinferior to the frontal recess, the Onodi cell pneumatizes superolateral to the sphenoid and abuts the optic nerve, and a concha bullosa is a pneumatized middle turbinate.

Reference: Scott-Brown's Otorhinolaryngology Head and Neck Surgery, 8th ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

Written and medically reviewed by the StethoPrep medical team.