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Related to Agger nasi: fovea ethmoidalis, limen nasi
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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 Anatomical variations identified in CT are Agger nasi (17.
Agger nasi cells arise from the anterior ethmoid sinus.
A pneumatized agger nasi cell produces a prominence or bulge along the lateral nasal wall anterosuperior to the anterior attachment of the middle turbinate.
Table 2: Prevalence of Anatomical Variants associated with Sinusitis Sinus- Disease Deviated Inferior Agger Nasi Nasal Turbinate Cells Septum Hypertrophy Maxillary sinusitis 10 12 7 Ethmoid sinusitis 12 9 5 MHMS 3 7 2 Frontal sinusitis 5 2 2 Pan-sinusitis -- 1 1 Sphenoid sinusitis 1 -- -- Total 31 31 17 Sinus- Disease Paradoxical Concha Total Middle Bullosa Turbinate Maxillary sinusitis 3 1 33 Ethmoid sinusitis 1 -- 27 MHMS -- -- 12 Frontal sinusitis 1 1 11 Pan-sinusitis -- -- 2 Sphenoid sinusitis -- -- 1 Total 5 2 86 Note: MHMS, mucosal hypertrophy of maxillary sinus.
The prevalence of the agger nasi cell in the general population is not known with certainty.
Middle turbinate, Concha Bullosa, Uncinate process, Agger Nasi cells, Haller cells and Posterior ethmoids showed very good agreement.
The agger nasi cell appears as a mound or eminence in the lateral wall of the nose, anterior to the origin of the middle turbinate.
Agger Nasi Cells: We found pneumatization of the agger nasi cells in 58(72.
Bolger et al (15) in 1991 and Lund et a1 (8) in 1997 reported that there were wide variations in the reported prevalence of anomalies in the agger nasi, concha bullosa, and Haller's cells.