CC BY 4.0 · Int Arch Otorhinolaryngol
DOI: 10.1055/s-0043-1773760
Original Research

The Effects of Nasal Septal Deviation on Anterior Skull Base Parameters

1   Department of Otolaryngology, Ankara City Hospital, Cankaya, Turkey
1   Department of Otolaryngology, Ankara City Hospital, Cankaya, Turkey
1   Department of Otolaryngology, Ankara City Hospital, Cankaya, Turkey
2   Department of Otolaryngology, İzmir Tepecik Training and Research Hospital, İzmir, Turkey
› Author Affiliations
Source of Funding None.


Introduction Functional endoscopic sinus surgery and endoscopic skull base surgery are frequently performed surgeries today. Nasal septal deviation is a common finding and can affect the surgical area. Therefore, it is important to examine the effect of this deviation on other anatomical structures.

Objectıve The aim of the present study was to determine whether there is a relationship between the degree of nasal septal deviation and anterior skull base structures using computed tomography (CT).

Methods A total of 312 patients (aged 18 to 65 years old) whose paranasal sinus CT images were available were included in the study. Measurements were obtained on images retrieved from Picture Archiving and Communication System (PACS) and Horos image archive systems in the bone window in the coronal and axial plane.

Results The mean age of 312 patients was 33.00 years old (standard deviation [SD] 11.22 years). The presence of septal deviation was not associated with changes in olfactory fossa (OF) depths, Keros degrees, and the angle between the lateral lamella and the cribriform lamella. However, OF depths and Keros degrees on the deviated side of the septum were found to change at a significant level (p < 0.05). No significant association was observed between the degree of septal deviation and cribriform lamella-lateral lamella angle.

Conclusion The study showed significantly increased OF depth and Keros degree on the deviated side of the nasal septum. Performing CT scans before endoscopic sinus surgery and endoscopic skull base surgery is important to increase the chances of a successful surgical outcome and to reduce complications.

Publication History

Received: 17 August 2022

Accepted: 11 May 2023

Article published online:
11 March 2024

© 2024. The Author(s). This is an open access article published by Thieme under the terms of the Creative Commons Attribution 4.0 International License, permitting copying and reproduction so long as the original work is given appropriate credit (

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