Usefulness of MRI Slices Parallel to the Optic Chiasma in a Case with Traumatic Optic Nerve Avulsion after a Bear Attack

Tamase, Akira; Tachibana, Osamu; Iizuka, Hideaki

doi:10.2176/nmc.cr.2019-0035

Cited by 3 publications

(3 citation statements)

References 6 publications

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“…Optic nerve avulsion has been reported after injuries with various causes, such as iron bars, bear attack, or falling from a tree. 7 , 8 , 9 Complete optic nerve avulsion occurred in all of these cases, but the optic nerve sheath was not intact. Mumcuoglu et al 10 reported a case of partial optic nerve avulsion with preservation of the sheath.…”

Section: Discussionmentioning

confidence: 92%

“…In the literature, avulsion of the optic nerve occurred mostly at the junction of the nerve and globe, but there are cases reported with different avulsion sites. Tamase et al 7 reported a case in which the optic nerve was split distal to the optic chiasm and temporal hemianopsia developed in the contralateral eye. In our case, the avulsion site was similar to the literature and the fellow eye was not affected.…”

Section: Discussionmentioning

confidence: 99%

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Sheath-Preserving Complete Optic Nerve Avulsion Following Closed-Globe Injury: A Case Report

Şahin

Furundaoturan

Barış

et al. 2022

tjo

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A 29-year-old man presented with a sudden loss of vision after a closed-globe injury. At presentation, he had no light perception in the right eye and the right pupil was dilated and nonreactive to light. On ophthalmological examination, the area of the optic nerve head was excavated, suggesting optic nerve avulsion. Magnetic resonance imaging scan showed optic nerve avulsion without rupture of the optic nerve sheath. Four months after the injury, the patient’s visual acuity remained unchanged. Gliosis developed at the avulsion site. Closed-globe injuries may cause severe posterior injury even if there is no anterior damage in the eye. To prevent unnecessary treatment, trauma patients should be examined carefully appropriate imaging to confirm the diagnosis.

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Section: Discussionmentioning

confidence: 92%

Section: Discussionmentioning

confidence: 99%

Sheath-Preserving Complete Optic Nerve Avulsion Following Closed-Globe Injury: A Case Report

Şahin

Furundaoturan

Barış

et al. 2022

tjo

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“…High diffusionweighted imaging (DWI) signal of the optic chiasma to the optic tract indicated nerve injury. 25 • Disruption in the lamina cribrosa region. 23 • No pathology except sporadic vitreous hemorrhage and lamina cribrosa irregularity.…”

Section: Magnetic Resonance Imaging (Mri)mentioning

confidence: 99%

The Utility of Ocular Imaging in Traumatic Optic Nerve Avulsion: A Case Report

Putera¹,

Nusanti²,

Rahmawati³

et al. 2022

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Objective: To describe a detailed presentation and the utility of ocular imaging, both ocular ultrasound and orbital computed tomography (CT), to confirm the diagnosis of traumatic ONA in which megadose steroid would give no advantage. Case Presentation: A five-year-old boy came with a unilateral sudden visual loss after incidentally falling with his left eye struck to a handlebar of a parked bicycle. His left eye had no light perception, ophthalmoplegia, and showing 4+ relative afferent pupillary defect. A hallmark "pit" sign and a pale retina without a tear were noted. B-scan ocular ultrasound displayed retinal step sign, vitreous hemorrhage in front of the optic canal, lamina cribrosa defect, edematous retina, and retracted optic nerve. Orbital computed tomography scan showed a disruption of the optic nerve-globe junction. Steroid infusion was decided not to be given. Conclusion: Ocular imaging, especially ultrasound, along with a thorough examination, is satisfactorily adequate to confirm the diagnosis of traumatic ONA.

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Optic Nerve Avulsion from Optochiasmal Region Secondary to an Animal Attack: A Case Report

Kaya

2023

Nigerian Journal of Clinical Practice

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Optic nerve avulsion without bone fracture was observed in four cases in the literature. This case is unique with its cranial effects and complications. A 50-year-old Caucasian female patient attacked by an animal on her left eye was admitted. Traumatic subarachnoid hemorrhage in the suprasellar cistern and epidural hematoma was observed upon brain computed tomography (CT). Enucleation and duraplasty were performed on the patient whose epidural hemorrhage did not increase. Two weeks after being discharged, the patient presented to the emergency room again with numbness on the right side of her face and sensory aphasia. The patient was followed up by medical treatment with left temporoparietal infarction and had completely recovered. Optic nerve avulsion secondary to trauma is a topic that needs to be carefully investigated due to potentially fatal complications. This article was written to share our experience with this rare condition and its case management.

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Usefulness of MRI Slices Parallel to the Optic Chiasma in a Case with Traumatic Optic Nerve Avulsion after a Bear Attack

Cited by 3 publications

References 6 publications

Sheath-Preserving Complete Optic Nerve Avulsion Following Closed-Globe Injury: A Case Report

Sheath-Preserving Complete Optic Nerve Avulsion Following Closed-Globe Injury: A Case Report

The Utility of Ocular Imaging in Traumatic Optic Nerve Avulsion: A Case Report

Optic Nerve Avulsion from Optochiasmal Region Secondary to an Animal Attack: A Case Report

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