P-84 Evaluation of variant anatomy of the sphenoid sinuses with Computed Tomography
Author(s):
R Bullock, D Chuck, M Didier, D Soares
Year of Presentation:
2025
Objective: Delineation of the anatomy and varied inherent
pneumatization patterns of the sphenoid sinuses is important to avoid increased morbidity and mortality as the role
of endoscopic endonasal surgery continues to expand. Computed tomography (CT) facilitates preoperative delineation
of the potentially unique anatomy for each patient.
Method: A retrospective, cross-sectional review of the pneumatization pattern, dimensions and lateral extent of the sphenoid sinus was done. Scans included were thin slice, (0.670mm and 0.625mm) non-contrast computed tomography (NCCT) scans of the paranasal sinuses obtained between January and May 2022. Scans were interpreted by two blinded Radiologists. The infrasellar depth, width and volume of the sinuses were recorded. Pnuematization patterns were further categorized based on the Hammer and Radberg (Types A-C) and Hiremath et al (Types A-D) classification systems.
Results: The scans of 120 patients met the inclusion criteria. There were 40 females and 80 males. Males were found to have a greater presellar width but there was no gender predilection with respect to infrasellar depth. The frequency of the sphenoid sinus pneumatization types were as follows: 1% conchal, 9% presellar, 30% sellar, and 60% postsellar.
Conclusion: Sphenoid sinus pneumatization configuration in the Jamaican population was found to be, in order of prevalence: post sellar (Type D), presellar (Type C), sellar (Type B) and conchal (Type A). This is similar to other regions with a predominantly African population.