• Mohammed A Basurrah and Soo W Kim.
• From the Department of Otolaryngology, Head and Neck Surgery, College of Medicine, Seoul St. Mary's Hospital, (Basurrah, Kim), The Catholic University of Korea, Seoul, South Korea, and from the Department of Surgery, College of Medicine (Basurrah), Taif University, Taif, Kingdom of Saudi Arabia.
• Saudi Med J. 2021 Sep 1; 42 (9): 981-985.

ObjectivesTo investigate the ethmoid infundibulum (EI) and maxillary sinus natural ostium (MSNO) dimensions in normal sinuses of the Asian population; identified variation between sides, gender, and age groups; and to assess the effects of such variation on the measurements.MethodsWe assessed EI dimension and MSNO diameter in computed tomography (CT) scans of the normal paranasal sinus of 100 patients who underwent trans-sphenoid endoscopic surgery. We compared demographic data and multiple anatomical variations.ResultsThe gap difference in EI length between the right and left sides significantly differed from 0 (0.47±1.38 mm). We found wider EI in people aged ≥60 years (2.44±0.59 mm), compared to people aged <60 years (2.25±0.31 mm). Ethmoid infundibulum length was greater among individuals with Haller cells (8.84±1.56 mm) than in individuals without them (7.92±1.47 mm). Furthermore, MSNO diameter was greater with accessory ostium (3.48±0.77 mm versus 3.02±0.72 mm, presence versus accessory ostium absence).ConclusionMultiple factors may affect EI and MSNO dimensions. Ethmoid infundibulum length differed between both sides. Ethmoid infundibulum width differed between individuals aged ≥60 years and individuals aged <60 years. Haller cells and accessory ostium presence were associated with significant differences in those measurements.Copyright: © Saudi Medical Journal.

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