Analysis of Anatomical Variations in the Paranasal Sinuses

Takeuchi Marie, Sakamoto Tatsunori, Kanemaru Shin-ichi

doi:10.7248/jjrhi.58.661

Objectives: Understanding anatomical variations in the paranasal sinuses before endoscopic sinus surgery is important to avoid serious surgical complications. This study aimed to demonstrate the prevalences of common anatomical variations in the paranasal sinuses and to compare these variations between groups with and without inflammation.Methods: Presurgical computed tomography was retrospectively reviewed to identify anatomical variations including Onodi cells, Haller cells, and anterior ethmoidal arteries distant from the skull base (floating AEAs), in 65 cases (both sides of the sinuses for a total 130 evaluations) undergoing endoscopic nasal and sinus surgery between April 2016 and March 2018 at Tazuke Kofukai, Medical Research Institute, Kitano Hospital. All patients were Japanese. The mean patients’ age was 55 (range, 6–96). Fifteen patients had a deviated nasal septum without chronic sinusitis, 26 had unilateral sinusitis, and 24 had bilateral sinusitis. Patients with a deviated nasal septum without chronic sinusitis and an unaffected side of unilateral sinusitis were classified into the group without imflammation, and those with an affected side of unilateral sinusitis and with bilateral sinusitis were classified into the group with imflammation.Results and conclusion: The overall prevalence of Onodi cells, Haller cells, and floating AEAs were 32.3%, 25.4%, and 35.0% respectively. The prevalences of these anatomical variations was not significantly different between the groups with or without inflammation. (P = 0.23, P = 0.17, P = 0.63).

Analysis of Anatomical Variations in the Paranasal Sinuses

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