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Published in: BMC Neurology 1/2018

Open Access 01-12-2018 | Research article

The MRZ reaction helps to distinguish rheumatologic disorders with central nervous involvement from multiple sclerosis

Authors: Tilman Hottenrott, Rick Dersch, Benjamin Berger, Dominique Endres, Daniela Huzly, Jens Thiel, Sebastian Rauer, Oliver Stich, Ulrich Salzer, Nils Venhoff

Published in: BMC Neurology | Issue 1/2018

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Abstract

Background

Some rheumatologic disorders may initially manifest with central nervous system (CNS) affection, mimicking the clinical, magnetic resonance imaging, and cerebrospinal fluid findings of multiple sclerosis (MS). The MRZ reaction (MRZR), composed of the three respective antibody indices (AIs) against measles, rubella, and varicella zoster virus, has been found positive frequently in MS patients. However, it is unclear whether the MRZR is helpful to distinguish rheumatologic disorders with CNS involvement (RDwCNS) from MS.

Methods

The MRZR was evaluated in patients with RDwCNS (n = 23), MS (n = 46; age and sex matched to patients with RDwCNS), and other inflammatory autoimmune neurological diseases affecting the CNS (OIND; n = 48). Both the stringency levels that have been used in previous MRZR studies, MRZR-1 (≥ 1 of 3 AIs positive) and MRZR-2 (≥ 2 of 3 AIs positive), were applied.

Results

There was no statistically significant difference in the prevalence of positive MRZR between patients with RDwCNS (MRZR-1: 13.0% and MRZR-2: 8.7%, respectively) and OIND (MRZR-1: 22.9% and MRZR-2: 8.3%, respectively). Compared to these two study cohorts, the MS group exhibited significantly higher prevalences of positive MRZR (MRZR-1: 82.6%, MRZR-2: 63.0%; p < 0.005 each).

Conclusions

Considering the high specificity of MRZR-2 for MS found in this study, MRZR-2 can be a useful diagnostic tool for distinguishing MS from RDwCNS or OIND.
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Metadata
Title
The MRZ reaction helps to distinguish rheumatologic disorders with central nervous involvement from multiple sclerosis
Authors
Tilman Hottenrott
Rick Dersch
Benjamin Berger
Dominique Endres
Daniela Huzly
Jens Thiel
Sebastian Rauer
Oliver Stich
Ulrich Salzer
Nils Venhoff
Publication date
01-12-2018
Publisher
BioMed Central
Published in
BMC Neurology / Issue 1/2018
Electronic ISSN: 1471-2377
DOI
https://doi.org/10.1186/s12883-018-1018-3

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