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SPHENOID SINUS SEPTATIONS CHARACTERISTICS AND THEIR RELATIONSHIP WITH THE INTERNAL CAROTID ARTERY ON PARANASAL SINUS CT SCANS: A STUDY AT UNIVERSITY MEDICAL CENTER HO CHI MINH CITY (2024-2025)
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Abstract
Introduction: The sphenoid sinus is a complex anatomical structure, deeply situated in the skull base, surrounded by numerous vital neurovascular structures, particularly the internal carotid artery (ICA). Sphenoid sinus septations exhibit significant variations in morphology and attachment sites; occasionally, they can attach directly to the ICA, posing a risk of injury to this artery during transsphenoidal endoscopic sinus surgery. Therefore, a detailed evaluation of the characteristics of sphenoid sinus septations and their relationship with the ICA is crucial to ensure safe and effective endoscopic surgical procedures. Objective: To investigate the morphological characteristics and attachment of sphenoid sinus septations to the internal carotid artery on paranasal sinus CT scans. Subjects and Methods: This cross-sectional descriptive study was conducted on 99 paranasal sinus CT scans without sphenoid sinus pathologies, performed from December 2024 to May 2025 at University Medical Center Ho Chi Minh City. Results: All sphenoid sinuses in the study had a primary intersphenoid septum. Approximately 13.13% of these septa presented with a "C" shape and 4.04% with an "S" shape in the anteroposterior direction. The attachment orientation of the primary septum was observed to be right-deviated in 50.51% of cases, left-deviated in 36.36%, and centrally attached in 13.13%. Accessory septa were noted in 70.71% of cases. The study revealed that in 34.34% of cases, the sphenoid sinus septations were attached to the osseous protuberance of the internal carotid artery. Conclusion: A comprehensive preoperative assessment of sphenoid sinus septal characteristics on paranasal sinus CT scans is essential to prevent potential complications arising from anatomical variations during endoscopic endonasal sinus surgery
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Keywords
Sphenoid sinus, sphenoid sinus septations, internal carotid artery.
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