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

Optic nerve avulsion is an exceedingly rare condition. Here, we describe a case of optic nerve avulsion in a 74-year-old man with temporal hemianopia in the contralateral eye after a bear attack. Magnetic resonance imaging (MRI) revealed separation of the optic nerve distal to the optic chiasma, whe...

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Autores principales: TAMASE, Akira, TACHIBANA, Osamu, IIZUKA, Hideaki
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Japan Neurosurgical Society 2019
Materias:
Case Report
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6753253/
https://www.ncbi.nlm.nih.gov/pubmed/31231085
http://dx.doi.org/10.2176/nmc.cr.2019-0035
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author TAMASE, Akira
TACHIBANA, Osamu
IIZUKA, Hideaki
author_facet TAMASE, Akira
TACHIBANA, Osamu
IIZUKA, Hideaki
author_sort TAMASE, Akira
collection PubMed
description Optic nerve avulsion is an exceedingly rare condition. Here, we describe a case of optic nerve avulsion in a 74-year-old man with temporal hemianopia in the contralateral eye after a bear attack. Magnetic resonance imaging (MRI) revealed separation of the optic nerve distal to the optic chiasma, whereas the high signal in diffusion-weighted imaging suggested nerve injury from the left side of the optic chiasma to the left optic tract. MRI slices parallel to the optic chiasma were obtained and used for evaluating the site of optic nerve avulsion and nerve injury, which were responsible for temporal hemianopia in the contralateral eye.
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spelling pubmed-67532532019-09-20 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 Neurol Med Chir (Tokyo) Case Report Optic nerve avulsion is an exceedingly rare condition. Here, we describe a case of optic nerve avulsion in a 74-year-old man with temporal hemianopia in the contralateral eye after a bear attack. Magnetic resonance imaging (MRI) revealed separation of the optic nerve distal to the optic chiasma, whereas the high signal in diffusion-weighted imaging suggested nerve injury from the left side of the optic chiasma to the left optic tract. MRI slices parallel to the optic chiasma were obtained and used for evaluating the site of optic nerve avulsion and nerve injury, which were responsible for temporal hemianopia in the contralateral eye. The Japan Neurosurgical Society 2019-09 2019-06-21 /pmc/articles/PMC6753253/ /pubmed/31231085 http://dx.doi.org/10.2176/nmc.cr.2019-0035 Text en © 2019 The Japan Neurosurgical Society This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-nd/4.0/
spellingShingle Case Report
TAMASE, Akira
TACHIBANA, Osamu
IIZUKA, Hideaki
Usefulness of MRI Slices Parallel to the Optic Chiasma in a Case with Traumatic Optic Nerve Avulsion after a Bear Attack
title Usefulness of MRI Slices Parallel to the Optic Chiasma in a Case with Traumatic Optic Nerve Avulsion after a Bear Attack
title_full Usefulness of MRI Slices Parallel to the Optic Chiasma in a Case with Traumatic Optic Nerve Avulsion after a Bear Attack
title_fullStr Usefulness of MRI Slices Parallel to the Optic Chiasma in a Case with Traumatic Optic Nerve Avulsion after a Bear Attack
title_full_unstemmed Usefulness of MRI Slices Parallel to the Optic Chiasma in a Case with Traumatic Optic Nerve Avulsion after a Bear Attack
title_short Usefulness of MRI Slices Parallel to the Optic Chiasma in a Case with Traumatic Optic Nerve Avulsion after a Bear Attack
title_sort usefulness of mri slices parallel to the optic chiasma in a case with traumatic optic nerve avulsion after a bear attack
topic Case Report
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6753253/
https://www.ncbi.nlm.nih.gov/pubmed/31231085
http://dx.doi.org/10.2176/nmc.cr.2019-0035
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