Background: Sphenoethmoid cells may be above the sphenoid sinus with/ or without
contact to optical nerve. Although sphenoethmoid cells are theoretically considered to possibly influence
the sphenoid sinus volume, we could not find any study in the literature on this issue.
Aims: The aim of our study was to detect sphenoethmoid cells and measure the sphenoid sinus volume
using multiplanar computerized tomography and also investigate the correlation between the
presence of sphenoethmoid cells and the sphenoid sinus volume.
Methods: Retrospectively 141 patients who had available paranasal computerized tomography images
were included in this study. The sphenoid sinus volumes of each patient were calculated individually
for each side, and the relationship between the presence of sphenoethmoid cell and sphenoid
sinus volume was investigated.
Results: Sphenoethmoid cells were detected at 106 (37.5%) of the total 282 sides in 141 patients.
No gender difference was observed. The total sphenoid sinus volume was significantly lower in the
group of patients who had bilateral sphenoethmoid cells than in the sphenoethmoid cell negative
group. In patients with a unilateral sphenoethmoid cell, a significant decrease in the sphenoid sinus
volume was observed only for the side where the sphenoethmoid cell was located.
Conclusion: It was observed that the sphenoethmoid cells caused a significant reduction in the
sphenoid sinus volume on the side where they were located. In the case of low sphenoid sinus aeration,
the sphenoethmoid cell should be kept in mind. Further studies with an extended patient series
are required to explore this issue.