DOI: http://dx.doi.org/10.18203/issn.2454-5929.ijohns20174663

Assessment of depth of olfactory fossa in pre-functional endoscopic sinus surgery computed tomography scan of paranasal sinuses

Abhijit Pawar, Santosh Konde, Priya Bhole

Abstract


Background: To evaluate the olfactory fossae depth according to the Keros' classification on pre functional endoscopic sinus surgery (pre-FESS) and determine the incidence and degree of asymmetry in the height of the ethmoid roof in the population of western Maharashtra.

Methods: Retrospective analysis of 200 multidetector CT studies (400 sides) of paranasal sinuses performed in between January to August, 2017.  

Results: According to the Keros’ classification, the incidence of different types of olfactory fossae was as follows: type I: 18.5%, type II: 74.5% and type III: 7%. Asymmetry in the ethmoid roof height was found in 11.5% of cases.

Conclusions: Keros’ type II was the commonest followed by type I and type III. There was asymmetry in the depth of the olfactory fossae in 11.5% cases. There was no significant gender predilection as far as type and asymmetry were considered.


Keywords


Computed tomography, Pre–functional endoscopic sinus surgery, Olfactory fossa, Lateral lamella

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