Optic Strut and Para-clinoid Region – Assessment by Multi-detector Computed Tomography with Multiplanar and 3 Dimensional Reconstructions

Suprasanna, K; Ravikiran, S. R.; Kumar, Arun; Chavadi, Channabasappa; Sanyal, Pulastya

doi:10.7860/jcdr/2015/15698.6615

Cited by 10 publications

(28 citation statements)

References 15 publications

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“…Surgical procedures on cavernous sinus and suprasellar region demand total removal of the optic strut, which if not removed can lead to damage of optic nerve or internal carotid artery. (6) Moreover studies have suggested that optic strut to be removed before anterior clinoid process, otherwise anterior process bony fragments may damage optic nerve or internal carotid artery. In the present study a lengthier optic strut of 3.97 ± 1.3 mm, 3.94 ± 1.0 mm on right and left side was observed compared to Korean population.…”

Section: Discussionmentioning

confidence: 99%

“…Moreover, superomedial margin of optic strut is significant in categorisation of intradural and extradural aneurysms. (6) Although, much attention has been given to the anatomical variation of the ACP and its removal using intradural and extradural techniques, a paucity of data exists regarding the optic strut. In this morphometric study, we evaluate the anatomic variability that is position and thickness (Length) of the optic strut and length of the ACP and the location and relation of OS with ACP in human skulls of Indian origin to provide a data for neurosurgeons planning a procedure of parasellar region.…”

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confidence: 99%

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Anterior Clinoid Process and Optic Strut- A Morphometric Study

Gupta¹,

Priya²

2018

jemds

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Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

Anterior Clinoid Process and Optic Strut- A Morphometric Study

Gupta¹,

Priya²

2018

jemds

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“…Previous studies have assessed the bony variations of the paraclinoid region by anatomical evaluation[ 7 14 15 ] and by MDCT in normal controls. [ 5 8 16 ] The present study evaluates these variations in CT angiographic studies of paraclinoid aneurysms retrospectively. The limitations of the study are smaller sample size, retrospective nature of the study, and unavailability of surgical follow-up of the patients.…”

Section: Discussionmentioning

confidence: 99%

Surgically Relevant Bony Anatomical Variations in Paraclinoid Aneurysms-Three-Dimensional Multi-Detector Row Computed Tomography-Based Study

Suprasanna

Kumar

2017

Journal of Neurosciences in Rural Practice

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Objective:To evaluate the proportion of surgically relevant anatomical variations such as caroticoclinoid foramen, interclinoid osseous bridge, and anterior clinoid pneumatization in patients with paraclinoid aneurysms based on computed tomography (CT) cerebral angiography studies.Materials and Methods:Fifty-four CT cerebral angiography studies showing paraclinoid aneurysms involving the cavernous, clinoid, and supraclinoid internal carotid artery (ICA) were retrospectively evaluated. Source images were processed for three-dimensional reconstructions to evaluate the presence and type of caroticoclinoid foramen, interclinoid osseous bridge, and multiplanar reconstructions with bone algorithm to study the type of pneumatization.Results:The study included 30 female and 24 male patients with mean age of 45.61 (10.47) years. Among the 108 sides studied in 54 patients, caroticoclinoid foramen was seen in 24 cases (22.22%), interclinoid osseous bridge was seen unilaterally in 1 case (0.9%), and pneumatization of anterior clinoid process occurred in 12 cases (11.11%). Incomplete caroticoclinoid foramen (11 cases) and Type I pneumatization (7 cases) were seen to be predominant subtypes. There was no statistically significant gender difference in the occurrence of caroticoclinoid foramen and anterior clinoid pneumatization. Seventy-four aneurysms were detected in 54 patients. Based on their location, 46 aneurysms involved supraclinoid ICA, 18 aneurysms in the clinoid segment, and 10 aneurysms in the cavernous segment. Caroticoclinoid foramen was most prevalent in clinoid aneurysms with 12 cases occurring in the clinoid segment.Conclusion:Notable proportions of caroticoclinoid foramen and pneumatization occur in cases of paraclinoid aneurysm. Radiological reports should emphasize on these surgically relevant bony anatomical variations.

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“…The ACP is connected to the sphenoid bone by 3 bony structures, which are the roof of the optic canal that is formed by the forward connection of the basal ACP and anterior root of the lesser sphenoid wing. [ 13 – 15 ] The bottom of the optic canal is formed by the backward connection of the basal ACP and the posterior root, and is known as the optic strut, and the lateral wall of the optic canal is formed by the interior margin of the basal ACP. These anatomic features of adjacent structures that are present along passage of the ICA suggest that fractures involving the optic canal can produce bone fragments that affect not only the optic nerve, but also the adjacent ICA.…”

Section: Discussionmentioning

confidence: 99%

Optic nerve injury-associated blunt cerebrovascular injury

Hu²,

Sima³

et al. 2017

Medicine

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Rationale:Blunt cerebrovascular injury (BCVI) is a rare complication that may occur after craniocervical trauma. The current literature is limited to extracranial carotid artery injuries; however, no reports have been published on blunt intracranial carotid injury (BICI), especially those associated with optic nerve injury.Patient concerns:Here we report on 3 BICI cases that demonstrated optic nerve injuries after craniofacial injuries. All 3 patients showed post-trauma vision loss on the injured side.Diagnoses:Optical canal fractures can be found in these patients, and carotid sulcus was compressed by the fragments. Computed tomography angiography (CTA) and digital subtraction angiography (DSA) were performed in all 3 patients.Interventions:Case 1 was given no further treatment, except for symptomatic support and rehabilitation therapy. Case 2 was treated with antiplatelet therapy for 3 days, and then a stent was inserted in the injured internal carotid. Case 3 received antiplatelet therapy and a internal carotid compression test was performed simultaneously for 2 weeks, then the injured internal carotid was completely blocked.Outcomes:Case 1 developed cerebral infarction that resulted in unilateral hemiplegia. Due to timely treatment, the remaining 2 patients had a better prognosis.Lessons:CTA should be performed primarily to exclude vascular injury and for CTA-positive patients, a further DSA should be performed to investigate pathological changes and for a definitive diagnosis. At last, the current therapeutic protocols for BCVI are not entirely applicable to intracranial vascular injury, and appropriate protocols for the treatment of BICI should be selected based on the combination of test results and the actual condition of the patient.

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Optic Strut and Para-clinoid Region – Assessment by Multi-detector Computed Tomography with Multiplanar and 3 Dimensional Reconstructions

Cited by 10 publications

References 15 publications

Anterior Clinoid Process and Optic Strut- A Morphometric Study

Anterior Clinoid Process and Optic Strut- A Morphometric Study

Surgically Relevant Bony Anatomical Variations in Paraclinoid Aneurysms-Three-Dimensional Multi-Detector Row Computed Tomography-Based Study

Optic nerve injury-associated blunt cerebrovascular injury

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