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CC BY-NC-ND 4.0 · Indian J Radiol Imaging 2018; 28(03): 273-279
DOI: 10.4103/ijri.IJRI_70_18
Neuroradiology & Head and Neck Imaging

Assessment of variations in sphenoid sinus pneumatization in Indian population: A multidetector computed tomography study

Shivaprakash B Hiremath
Department of Radiodiagnosis, Pushpagiri Institute of Medical Sciences and Research Centre, Thiruvalla, Kerala, India
,
Amol B Gautam
Department of Radiodiagnosis, Pushpagiri Institute of Medical Sciences and Research Centre, Thiruvalla, Kerala, India
,
Keerthy Sheeja
Department of Radiodiagnosis, Pushpagiri Institute of Medical Sciences and Research Centre, Thiruvalla, Kerala, India
,
Geena Benjamin
Department of Radiodiagnosis, Pushpagiri Institute of Medical Sciences and Research Centre, Thiruvalla, Kerala, India
› Author Affiliations Financial support and sponsorship Nil.
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Abstract

Background and Purpose: The purpose of our study was to assess the prevalence of variations in the extent of sphenoid pneumatization in the Indian population and compare with existing literature. Materials and Methods: This retrospective study included 500 patients who underwent CT of the paranasal sinuses. The multiplanar reformations of paranasal sinus were assessed for the type of pneumatization of the sphenoid sinus and type of clival, lateral recess, lesser wing, and anterior recess extensions. Results: The conchal, presellar, incomplete sellar, and complete sellar types comprised 0%, 1.2%, 22.2%, and 76.6% of patients. The extensions of pneumatization subtypes in the study population were clival in 76.6% subjects; lateral recess, lesser wing, and anterior recess in 59.7%, 20.4%, and 20.4% of sinuses, respectively. The pure forms were seen in 25.4% and combined forms in 61% of sinuses. The presellar type (1.2%) was less common and sellar type (98.8%) being common in our population compared to the Caucasian and East Asian population. The sphenoid sinuses were extensively pneumatized in our population compared to the Chinese and Caucasian population, the prevalence being 76.6%, 68%, and 44.5% for clival; 59.7%, 46%, and 28.3% for lateral recess; 20.4%, 32%, and 12% for lesser wing extension, respectively. The pure forms were relatively less common and combined forms being more common compared to the Chinese and Caucasian population in our study. Conclusion: The extent of pneumatization of the sphenoid sinus has clinical and surgical implications in sellar and central skull base lesions, and variability in different populations confirms that ethnicity influences the differences in prevalence.

Keywords

Anatomic variation - cerebrospinal fluid leak; idiopathic intracranial hypertension - pituitary tumors - sphenoid sinus - transnasal endoscopic surgery

Supplementary Material



Publication History

Article published online:
26 July 2021

© 2018. Indian Radiological Association. This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial-License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commercial purposes, or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by-nc-nd/4.0/).

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