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Published in: European Radiology 7/2021

01-07-2021 | Giant Cell Arteritis | Magnetic Resonance

High-resolution MRI demonstrates signal abnormalities of the 3rd cranial nerve in giant cell arteritis patients with 3rd cranial nerve impairment

Authors: Sandy Mournet, Thomas Sené, Frédérique Charbonneau, Guillaume Poillon, Catherine Vignal, Gaëlle Clavel, Kévin Zuber, Julien Savatovsky, Augustin Lecler

Published in: European Radiology | Issue 7/2021

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Abstract

Objective

To determine the sensitivity and specificity of high-resolution (HR) MRI for detecting signal abnormalities of cranial nerves (CN) in giant cell arteritis (GCA) patients presenting with diplopia.

Methods

This IRB-approved retrospective single-center study included GCA patients who underwent 3-T HR MRI from December 2014 to January 2020. Two radiologists, blinded to all data, individually assessed for the presence of enhancement of the 3rd, 4th, and/or 6th CN on post-contrast HR imaging and high signal intensity on HR T2-WI, for signal abnormalities of extraocular muscles and the brainstem, and for inflammatory changes of the ophthalmic and extracranial arteries. A Fisher’s exact test was used to compare patients with or without diplopia.

Results

In total, 64 patients (42/64 (66%) women and 22/64 (34%) men, mean age 76.3 ± 8 years) were included. Of the 64 patients, 14 (21.9%) presented with diplopia. Third CN enhancement was detected in 7/8 (87.5%) patients with 3rd CN impairment, as compared to no patients with 4th or 6th CN impairment or to patients without diplopia (p < 0.001). Third CN abnormal high signal intensity on HR T2-WI was detected in 4/5 patients (80%) with 3rd CN impairment versus none of other patients (p < 0.001). Sensitivity, specificity, positive predictive value, and negative predictive value for detecting 3rd CN signal abnormalities were of 0.88, 1, 1, and 0.99 and 0.8, 1, 1, and 0.98 for post-contrast HR imaging and HR T2-WI, respectively.

Conclusions

HR MRI had excellent diagnostic sensitivity and specificity when detecting signal abnormalities of the 3rd CN in GCA patients presenting with 3rd CN impairment.

Key Points

Third cranial nerve enhancement was detected in all patients with 3rd cranial nerve impairment except for one with transient diplopia.
The “check mark sign” might be useful to identify 3rd cranial nerve signal abnormalities in the orbital apex.
No signal abnormalities of the 4th or 6th cranial nerves could be detected on high-resolution MRI.
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Literature
20.
go back to reference Hunder GG, Bloch DA, Michel BA et al (1990) The American College of Rheumatology 1990 criteria for the classification of giant cell arteritis. Arthritis Rheum 33:1122–1128CrossRef Hunder GG, Bloch DA, Michel BA et al (1990) The American College of Rheumatology 1990 criteria for the classification of giant cell arteritis. Arthritis Rheum 33:1122–1128CrossRef
Metadata
Title
High-resolution MRI demonstrates signal abnormalities of the 3rd cranial nerve in giant cell arteritis patients with 3rd cranial nerve impairment
Authors
Sandy Mournet
Thomas Sené
Frédérique Charbonneau
Guillaume Poillon
Catherine Vignal
Gaëlle Clavel
Kévin Zuber
Julien Savatovsky
Augustin Lecler
Publication date
01-07-2021
Publisher
Springer Berlin Heidelberg
Published in
European Radiology / Issue 7/2021
Print ISSN: 0938-7994
Electronic ISSN: 1432-1084
DOI
https://doi.org/10.1007/s00330-020-07595-x

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