Radiological evaluation of septal bone variations in the sphenoid sinus

Dündar, Rıza

doi:10.2399/jmu.2014001002

Cited by 7 publications

(6 citation statements)

References 11 publications

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“…These results were different from other findings, possibly due to the presence of racial or anatomographical variants across different geographical or ancestral origins that might show the evolution of anatomical variations along ethno-geographical or racial diversity. In our study, the absence of septa was found in only 1% of the patients, while it was 2.7% in Nigerians [4,31] and 2.2% in other studies [32][33][34]. These findings are almost comparable despite the difference in their sample size.…”

Section: Discussionsupporting

confidence: 49%

Anatomographic Variants of Sphenoid Sinus in Ethiopian Population

et al. 2020

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Neurosurgeons often neglect the sphenoid sinus due to its deep location and difficulties in accessing during surgical interventions. Disease of the sphenoid sinus is difficult to diagnose since its presenting symptoms are difficult to recognize. Moreover, compared with other paranasal sinuses, the sphenoid sinus is considered the most variable air sinus in terms of its degree of pneumatization, number and position of inter-sinus septa, and its relationship with the surrounding anatomical structures. Anatomical variations of the sphenoid sinus are significant from a neurosurgical point of view. Understanding of these variations and its relationships with surrounding structures such as the internal carotid artery, optic nerve, and pituitary gland are clinically relevant to minimize injuries associated with surgical procedures that involve sphenoid sinus. We implemented principles of imaging using computed tomography to elucidate any anatomical variations of the sphenoid sinus in the Ethiopian population. We conducted a prospective study in 200 patients with ages 18–79, who underwent scans of the sphenoid sinus at the Tikur Anbessa Referral Teaching Hospital in 2017–2018. Our findings revealed an incidence of anatomographical variations in terms of pneumatization that varied between 2–50%. These variants include 2% conchal, 25.5% presellar, 50% sellar, and 22.5% postsellar pneumatization. We also demonstrated anatomographic variants in terms of septation, 77.5% single complete septa, 11.5% single incomplete, 10% double septa, and 1% absence of septa. In summary, the sellar pneumatization was found to be the most clinically relevant anatomographic variant among Ethiopians participating in the study, of which 90% were tomographically single septated. These variants must be taken into consideration during trans-sphenoidal surgery and knowledge of the variations has clinical implication in minimizing injuries during invasive surgical procedures involving the sphenoid sinus.

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Section: Discussionsupporting

confidence: 49%

Anatomographic Variants of Sphenoid Sinus in Ethiopian Population

et al. 2020

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“…12 World literature shows great variation in the prevalence of more than one intrasphenoid sinus septations from as high as 95% to as low as 7.1%. 8,9,[12][13][14][15] Double septa were found in 11% in present study and more than 2 septa in 3.4%. The attributable factor for these variations seems to be small sample size in majority of these studies.…”

Section: Resultsmentioning

confidence: 54%

Anatomical variations of intra-sphenoid sinus septations in a sample of Kashmiri population: a non-contrast computed tomography study

Wani¹,

Shiekh²,

Parry³

et al. 2019

Int J Res Med Sci

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Background: The sphenoid sinus shows multitude of variations in pneumatization, size and pattern of septations leading to differences in its segmentation. Pre-operative knowledge of their attachment especially to posterolateral bony walls covering vital structures is of utmost importance for a safe trans-sphenoidal approach for various surgical procedures involving skull base. Non-contrast computed tomography (NCCT) with its ability to provide multiplanar reformations (MPR) with sharp algorithms is now a reference standard for visualization of these intra-sphenoid sinus septations preoperatively. The objective of this study was to determine the number and attachment of intra-sphenoid sinus septations in a Kashmiri population sample.Methods: NCCT head images of 591 patients in the age range of 16 to 75 years were analyzed retrospectively. Individuals with age less than 16 years, previous surgery involving skull base/sphenoid sinus, trauma causing hem sinus/fractures around skull base or having space occupying lesions around skull base/sphenoid sinus were excluded from the study. On the CT workstation multi-planar coronal, sagittal and axial reconstructions were performed and subsequently examined.Results: The age range was 16 to 75 years with mean age of 43.56 years of which 453 (76.6%) were males and 138 (23.4%) were females. Single intra-sphenoid septation was the most common anatomic variant in present study (79.7%) being complete in 71.7% and partial or incomplete in 8% of the examined subjects. Double septa were found in 11% inpresent study and more than 2 septae in 3.4%. After sellar attachment (51%) the next most common site of attachment was to the carotid canal (29.5%) (23% to left ICA and 6.5% to the right ICA).Conclusions: Intricate knowledge about sphenoid sinus, its pneumatization and anatomical variations in intra-sphenoid sinus septations and its relationship with the surrounding vital structures is of utmost importance before performing any endoscopic/open surgery involving skull base via trans-sphenoidal approach. The present study shows that a significant percentage of septal attachment to the carotid canal makes main sphenoidal septum as not so reliable landmark for endoscopic procedures as used to be in the pre-imaging era. Thus, preoperative CT is mandatory to avoid injuries to para-sellar neurovascular and glandular structures.

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“…They also reported that there was a significant difference in the mean distances between the deviated sphenoid septum and the internal carotid arteries deviation to the opposite sides. Dunder et al, (16) Thakur et al, (21) conducted a study in Uttarakhand, India and reported that their study includes 60.5% of male participants with 89.5% of cases with sellar type of pneumatization and single intersinus septum was noted among 68% of cases. These findings are consistent with the findings of the present study.…”

Section: Discussionmentioning

confidence: 99%

Radiological study of variations in intersphenoidal septum in a south Indian population- a retrospective cross-sectional study

B.¹,

Prabakaran²,

Rajasekaran³

2023

Biomedicine

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Introduction and Aim: The anatomical variations in intersphenoidal septum (ISS) will affect the ease of surgery and risk of intraoperative injury to neurovascular structures. It is very important to assess the same in different populations using preoperative imaging. Hence the objective of this study is to determine the prevalence of anatomical variations of intersphenoidal septum and its pattern of attachment among Southern Indian population for better planning of surgery and avoid complications. Materials and Methods: A retrospective cross-sectional analysis of patients who underwent computed tomography paranasal sinus at a tertiary care hospital was done. Data from 186 cases in total were used in this study. The proportion of cases with intersphenoidal septa was the primary outcome evaluated, and the number, location, development, and point of termination of intersphenoidal septa were the secondary outcomes. Statistical software for social studies was used to analyse the data. Results: Absence of intersphenoidal septum was noted in 0.5% of cases with predominant sellar type of pneumatization. Also, single intersphenoidal septum (81.6%), right sided deviation of septum (48.1%), complete formation of intersphenoidal septum (92.4%) and protrusion of septum towards optic nerve canal (45.9%) were the common findings noted in this study. Conclusion: Anatomical variations of the intersphenoidal septum clearly signify that the surgeons should keenly note the variations before planning the surgery.

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Radiological evaluation of septal bone variations in the sphenoid sinus

Cited by 7 publications

References 11 publications

Anatomographic Variants of Sphenoid Sinus in Ethiopian Population

Anatomographic Variants of Sphenoid Sinus in Ethiopian Population

Anatomical variations of intra-sphenoid sinus septations in a sample of Kashmiri population: a non-contrast computed tomography study

Radiological study of variations in intersphenoidal septum in a south Indian population- a retrospective cross-sectional study

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