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| Item Type: | Article |
|---|---|
| Title: | Optic radiation damage in multiple sclerosis is associated with visual dysfunction and retinal thinning - an ultrahigh-field MR pilot study |
| Creators Name: | Sinnecker, T., Oberwahrenbrock, T., Metz, I., Zimmermann, H., Pfueller, C.F., Harms, L., Ruprecht, K., Ramien, C., Hahn, K., Brück, W., Niendorf, T., Paul, F., Brandt, A.U., Dörr, J. and Wuerfel, J. |
| Abstract: | OBJECTIVE: To investigate posterior visual pathway damage in multiple sclerosis using ultrahigh-field magnetic resonance imaging (MRI) at 7 Tesla (7 T), and to determine its correlation with visual disability and retinal fibre layer (RNFL) damage detectable by optic coherence tomography (OCT). METHODS: We studied 7 T MRI, OCT, functional acuity contrast testing (FACT), and visually evoked potentials (VEP, n = 16) in 30 patients (including 26 relapsing-remitting MS and four clinically isolated syndrome patients) and 12 healthy controls to quantify RNFL thickness, optic radiation lesion volume, and optic radiation thickness. RESULTS: Optic radiation lesion volume was associated with thinning of the optic radiation (p < 0.001), delayed VEP (p = 0.031), and visual disability indicated by FACT (p = 0.020). Furthermore, we observed an inverse correlation between optic radiation lesion volume and RNFL thickness (p < 0.001), including patients without previous optic neuritis (p < 0.001). CONCLUSIONS: Anterior visual pathway damage, but also (subclinical) optic radiation integrity loss detectable by 7 T MRI are common findings in MS that are mutually affected. Given the association between optic radiation damage, visual impairment, and increased VEP latency in this exploratory study of a limited sample size, clinicians should be aware of acute lesions within the optic radiation in patients with (bilateral) visual disturbances. KEY POINTS: * Focal destruction of the optic radiation is detectable by 7 T MRI. * Focal optic radiation damage is common in MS. * Optic radiation damage is associated with RNFL thinning, detectable by OCT. * Optic radiation damage is associated with delayed VEP and visual dysfunction. * RNFL thickness in non-optic neuritis eyes correlates with optic radiation demyelination. |
| Keywords: | Multiple Sclerosis, Magnetic Resonance Imaging, Retinal Nerve Fibre Layer, Optic Radiation, Trans-Synaptic Degeneration |
| Source: | European Radiology |
| ISSN: | 0938-7994 |
| Publisher: | Springer |
| Volume: | 25 |
| Number: | 1 |
| Page Range: | 122-131 |
| Date: | January 2015 |
| Official Publication: | https://doi.org/10.1007/s00330-014-3358-8 |
| PubMed: | View item in PubMed |
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