Anatomic Variation of Sphenoid Sinus and Related Structures in Libyan Population: CT Scan Study

Hewaidi, G.H.; Omami, G.M.

doi:10.3402/ljm.v3i3.4775

Cited by 108 publications

(129 citation statements)

References 29 publications

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“…the small space on the lateral wall of the sphenoid sinus, between the optic canal, supe-riorly, and the carotid prominence, inferiorly. The opticocarotid recess is presumed to concur with ipsilateral optic nerve protrusion into the sphenoid sinus 8 . Sirikci et al 1 , Ünal et al 4 and Hewaidi et al 8 reported a significant relationship between protrusion of the ON into SS and the pneumatization of ACP.…”

Section: Discussionmentioning

confidence: 99%

“…The opticocarotid recess is presumed to concur with ipsilateral optic nerve protrusion into the sphenoid sinus 8 . Sirikci et al 1 , Ünal et al 4 and Hewaidi et al 8 reported a significant relationship between protrusion of the ON into SS and the pneumatization of ACP. We observed 23.5 % patients on the right side and 14.7 % patients on the left side with both pneumatization of ACP and protrusion of ON.…”

Section: Discussionmentioning

confidence: 99%

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Assessment of the Relation of the Optic Nerve to the Posterior Ethmoid and Sphenoid Sinuses by Computed Tomography

Heskova¹,

Mellova²,

Holománová³

et al. 2009

Biomed Pap Med Fac Univ Palacky Olomouc Czech Repub

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Objective: The aim of this study was to observe the relationship of the sphenoid sinus and posterior ethmoid cells with the optic nerve.Material and Methods: 34 CT scans (68 sides) of paranasal sinuses of patients older than 18 years were retrospectively reviewed. Images were assessed in two planes -axial and coronal. We observed the position and relationship of the optic nerve to the posterior ethmoid and sphenoid sinuses, bony dehiscence and protrusion of the optic nerve into sinuses, and pneumatization of the anterior clinoid process.Results: The most frequent position of optic nerve (ON) was a location close to the posterior ethmoid and sphenoid sinuses without contacting or indentation of the wall -55.9 % (38 nerves). The bulging of ON to sphenoid sinus was found in 14.7 % (10 nerves) and the course of the nerve through sinus in 16 nerves (23.5 %). The position of ON intimately to both sinuses was observed in 5.9 % (4 nerves). Protrusion of ON, dehiscence of the bony wall and pneumatization of anterior clinoid process (ACP) was seen in 12 (35.3 %), 4 (11.8 %) and 9 (26.5 %) patients, respectively. Both the protrusion of ON and ACP pneumatization were present in 8 (23.5 %) patients on the right side and in 5 (14.7 %) patients on the left side.Conclusion: Variations of posterior ethmoid and sphenoid sinuses are numerous and may entail potential risk of injury of the ON during sinus surgery. Knowledge of individual differences and configurations in the operation area may help the surgeon to prevent complications. Computed tomography is the preferred radiographic modality for evaluation of bony variations and the pathology of this region.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Assessment of the Relation of the Optic Nerve to the Posterior Ethmoid and Sphenoid Sinuses by Computed Tomography

Heskova¹,

Mellova²,

Holománová³

et al. 2009

Biomed Pap Med Fac Univ Palacky Olomouc Czech Repub

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“…The prevalence of the ICA bulging (Figure 10) into the sphenoid sinus varies from 3 to 41% [15,[47][48][49][50][51]. In case of bulging, an ICA injury may occur due to a trauma or a complication of sinus disease.…”

Section: Sphenoid Sinus Ica and Mn Relationsmentioning

confidence: 99%

“…In case of bulging, an ICA injury may occur due to a trauma or a complication of sinus disease. If the surgeon is not aware of this variation, fatal haemorrhage can occur; it is Paranasal Sinuseshardly possible to control the bleeding from this artery, and neurological sequelae are inevitable [15,51]. Another complication during the surgery is if the septum in the sphenoid sinus (Figure 11) adheres to the wall of the ICA, the surgeon must be careful about not fracturing it to avoid the artery damage [18,50].…”

Section: Sphenoid Sinus Ica and Mn Relationsmentioning

confidence: 99%

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CBCT Imaging of Paranasal Sinuses and Variations

Orhan¹,

Aksoy²,

Oz³

2017

Paranasal Sinuses

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Paranasal sinuses located in the bones surrounding the nasal cavity are called maxillary, ethmoid, frontal and sphenoid sinuses. In relation with their location, these sinuses contribute to the development of the facial structures, jaws and upper airway. During the developmental process of the paranasal sinuses, anatomic variations can occur in consequence of intra and extramural migration of the ethmoid air cells, overpneumatization or hypoplasia of the sinuses and bulging of the neurovascular structures to the sinuses. Some of these anatomic variations may affect the drainage pathways, pave the way for chronic infections and cause difficulties when performing paranasal sinuses surgery.Therefore, the aim of this chapter was to examine the paranasal sinus anatomic variations with cone beam computed tomography (CBCT).

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Relationship between sphenoid sinus volume and accessory septations: A 3D assessment of risky anatomical variants for endoscopic surgery

Gibelli

Cellina

Gibelli

et al. 2019

The Anatomical Record

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Sphenoid sinus accessory septations involve serious complications during their removal for the injury of the internal carotid artery (ICA) and the optic nerve (ON). The relationships of this anatomical variant with sphenoid size still remain unclear. In the present study, 260 patients (equally divided among sexes, aged between 18 and 92 years) were retrospectively assessed. Number of accessory septations and their relationship with ICA and ON were recorded. The 3D model of sphenoid sinuses was extracted. Pearson's coefficient was calculated to assess correlations between the volume of sphenoid sinuses and the number of septations (P < 0.05). Sexrelated differences in prevalence of septations inserted onto ICA or ON were assessed through chi-square test (P < 0.05). Differences in volume between patients with and without ICA or ON septal insertions were assessed through Mann-Whitney test (P < 0.05). In most of the cases, two septations were found (24.6%), whereas only 21.9% of patients did not show any septum. ICA and ON septal insertions were found in 20.8% and 7.7% of cases, respectively. Number of septations significantly increased with sinus volume, independently from sex (P < 0.001). Moreover, volume was significantly higher in patients with ICA septal insertion (P < 0.001), whereas no difference was found between subjects with and without ON septal insertion (P > 0.05). The present study first proved that septations and probability of ICA insertion are related with sphenoid volume. On the other side, ON insertion does not depend upon sphenoid sinuses size. Anat Rec, 303:1300-1304, 2020.

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Anatomic Variation of Sphenoid Sinus and Related Structures in Libyan Population: CT Scan Study

Cited by 108 publications

References 29 publications

Assessment of the Relation of the Optic Nerve to the Posterior Ethmoid and Sphenoid Sinuses by Computed Tomography

Assessment of the Relation of the Optic Nerve to the Posterior Ethmoid and Sphenoid Sinuses by Computed Tomography

CBCT Imaging of Paranasal Sinuses and Variations

Relationship between sphenoid sinus volume and accessory septations: A 3D assessment of risky anatomical variants for endoscopic surgery

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