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

Hiremath, Shivaprakash B; Gautam, Amol; Sheeja, Keerthy; Benjamin, Geena

doi:10.4103/ijri.ijri_70_18

Cited by 53 publications

(67 citation statements)

References 33 publications

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“…Sphenoid sinus septal bone variations are also considered the potential anatomographical variations illustrated in this region [ 27 ]. Our study elucidated that almost 90% of Ethiopian population participating in the study had single septation, whereas 1% were without septation.…”

Section: Discussionmentioning

confidence: 99%

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: Discussionmentioning

confidence: 99%

Anatomographic Variants of Sphenoid Sinus in Ethiopian Population

et al. 2020

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“…In the conchal type of the sphenoid, the distance from the pneumatized cavity to the anterior wall of the sella is greater than 10mm 11,[13][14][15] . On CT scan examination, the images point out the presence of bony tissue between the posterior wall of the sphenoid sinus and the anterior wall of the sella (Figure 1).…”

Section: Conchal Typementioning

confidence: 99%

“…In the presellar type of sphenoid sinus, the posterior margin of the sinus pneumatization is situated just anterior to the anterior wall of the sella 10,[13][14][15] .…”

Section: Presellar Typementioning

confidence: 99%

“…On CT examination, the posterior wall of the sphenoid will never lie beyond the posterior wall of the sella 10,[13][14][15] . This is a quite friendly surgical situation for the interdisciplinary surgical team, first of all because of the wide dimensions of the sphenoid sinus and second because of the safe distance to the important anatomic elements (internal carotid artery, optic nerve, etc) which may be damaged during the endoscopic sinus approach (Figure 3).…”

Section: Incomplete Sellar Typementioning

confidence: 99%

“…While performing an endoscopic surgical approach of the sphenoid pathology, it is compulsory to know exactly the dimensions and extensions of the sphenoid in order to avoid complications which may occur [1][2][3][4][5][6] . The gold standard of the sphenoid sinus investigation is represented by the computed tomography (CT) imaging, which is mandatory for every endoscopic approach of the region [4][5][6][7][8][9][10][11][12][13][14][15] .…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Pneumatization and extensions of the sphenoid sinus: a CT overlook

Budu

Crăc²,

Goanță

et al. 2021

Romanian Journal of Rhinology

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The sphenoid bone has a specific development during fetal life, until it reaches its complete dimensions. The sphenoid cavities are usually undeveloped at birth and they reach their full volume only after puberty. Pneumatization of the sphenoid sinus is unpredictable and different for each person.The authors do not intend to develop a literature review or to compare their experience with data already published. The paper is not an original imagistic study of the authors, it only represents a short communication on the imagistic anatomy of the sphenoid sinus, in order to avoid complications during surgery in the area.Based on their patients own CT-scan examination, the authors try to classify the anterior, lateral and posterior extensions in close connection with the surgical endoscopic approach of the sphenoid sinus.

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Surgical Navigation in the Anterior Skull Base Using 3-Dimensional Endoscopy and Surface Reconstruction

Bartholomew,

Zhou,

Boreel

et al. 2024

JAMA Otolaryngol Head Neck Surg

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ImportanceImage guidance is an important adjunct for endoscopic sinus and skull base surgery. However, current systems require bulky external tracking equipment, and their use can interrupt efficient surgical workflow.ObjectiveTo evaluate a trackerless surgical navigation system using 3-dimensional (3D) endoscopy and simultaneous localization and mapping (SLAM) algorithms in the anterior skull base.Design, Setting, and ParticipantsThis interventional deceased donor cohort study and retrospective clinical case study was conducted at a tertiary academic medical center with human deceased donor specimens and a patient with anterior skull base pathology.ExposuresParticipants underwent endoscopic endonasal transsphenoidal dissection and surface model reconstruction from stereoscopic video with registration to volumetric models segmented from computed tomography (CT) and magnetic resonance imaging.Main Outcomes and MeasuresTo assess the fidelity of surface model reconstruction and accuracy of surgical navigation and surface-CT model coregistration, 3 metrics were calculated: reconstruction error, registration error, and localization error.ResultsIn deceased donor models (n = 9), high-fidelity surface models of the posterior wall of the sphenoid sinus were reconstructed from stereoscopic video and coregistered to corresponding volumetric CT models. The mean (SD; range) reconstruction, registration, and localization errors were 0.60 (0.24; 0.36-0.93), 1.11 (0.49; 0.71-1.56) and 1.01 (0.17; 0.78-1.25) mm, respectively. In a clinical case study of a patient who underwent a 3D endoscopic endonasal transsphenoidal resection of a tubercular meningioma, a high-fidelity surface model of the posterior wall of the sphenoid was reconstructed from intraoperative stereoscopic video and coregistered to a volumetric preoperative fused CT magnetic resonance imaging model with a root-mean-square error of 1.38 mm.Conclusions and RelevanceThe results of this study suggest that SLAM algorithm–based endoscopic endonasal surgery navigation is a novel, accurate, and trackerless approach to surgical navigation that uses 3D endoscopy and SLAM-based algorithms in lieu of conventional optical or electromagnetic tracking. While multiple challenges remain before clinical readiness, a SLAM algorithm–based endoscopic endonasal surgery navigation system has the potential to improve surgical efficiency, economy of motion, and safety.

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

Cited by 53 publications

References 33 publications

Anatomographic Variants of Sphenoid Sinus in Ethiopian Population

Anatomographic Variants of Sphenoid Sinus in Ethiopian Population

Pneumatization and extensions of the sphenoid sinus: a CT overlook

Surgical Navigation in the Anterior Skull Base Using 3-Dimensional Endoscopy and Surface Reconstruction

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