is the second most common anatomical variant.
A prominent agger nasi
cell produces a distinct bulge anterior to anterior attachment of middle turbinate & may even displace the anterior attachment of middle turbinate posterosuperiorly.
The agger nasi
cell: the key to understanding the anatomy of the frontal recess.
The basal lamella of the ethmoid, the ethmoid strut, the anterior and posterior ethmoid cells, the medial wall of the ethmoid sinus, and the agger nasi
cell (if one had been present) were all removed (figure, B).
In this study, the common anatomical variations found among the 360 CT scans evaluated were Pneumatized Agger nasi
cells, Concha bullosa, Asymmetry ethmoidal roof, Haller cells, Asymmetry of ethmoid fovea, Anterior ethmoidal artery canal, Paradoxical bending of middle turbinate, Suprabullar Cells, Infrabullar Cells, and Onodi cells.
The agger nasi
cells (Latin for 'nasal mound') are the most anterior ethmoid cells.
Messerklinger  (1978) found anatomical variations like nasal septum deviation, spur, concha bullosa, Agger nasi
cells, paradoxical middle turbinate, abnormal uncinate process and enlarged bulla are responsible for decreased sinus ventilation and pathogenesis of sinus disease.
Computed tomography (CT) of the sinuses showed bilateral mucosal thickening in the frontal sinuses and the presence of a well-defined left-sided agger nasi
cell (figure, A).
Patients who required other nasal procedures like septoplasty, conchoplasty, and clearance of agger nasi
cells were included in the study.
The mass was opened with a microdebrider (figure, B), and it was identified as a hyperpneumatized agger nasi
cell (figure, C).
During surgery, we were able to visualize the natural ostium of her left agger nasi
Pneumatization of agger nasi
was seen in 58 (72.5%) nasal cavities.