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01.12.2014 | Original Research | Ausgabe 2/2014 Open Access

Neurology and Therapy 2/2014

A Prospective Study of Patients with Brain MRI Showing Incidental T2 Hyperintensities Addressed as Multiple Sclerosis: a Lot of Work to do Before Treating

Zeitschrift:
Neurology and Therapy > Ausgabe 2/2014
Autoren:
Christine Lebrun, Mikael Cohen, Annabelle Chaussenot, Lydiane Mondot, Stephane Chanalet
Wichtige Hinweise

Electronic supplementary material

The online version of this article (doi:10.​1007/​s40120-014-0024-7) contains supplementary material, which is available to authorized users.

Abstract

Introduction

With the development of magnetic resonance imaging (MRI) and publications about radiologically isolated syndrome (RIS), a lot of patients are referred to multiple sclerosis (MS) tertiary centers to confirm diagnosis of RIS or MS when brain T2 abnormalities are identified, whatever their characteristics. We evaluate prospectively the occurrence of RIS or MS and sensitivity, specificity and predictive value of McDonald criteria in diagnosis for patients presenting with incidental brain MRI T2 lesions.

Methods

The authors ran standardized procedures on 220 consecutive patients addressed by general practitioners or neurologists to confirm RIS or MS diagnosis on brain MRI and give a therapeutic advice. All patients underwent neurological tests, extensive blood screening, cerebrospinal fluid (CSF) examination, visual evoked potential (VEP) and follow-up MRI after 3, 6, 12 and 24 months to consider dissemination in time and space.

Results

Patient characteristics were: 165 women and 55 men, mean age: 42.7 years old (23–59). The major symptom motivating MRI was headaches (39%), sensitive atypical manifestations or pain (12%), mood disorders (10%), transient visual symptoms (9%), fatigue (8%), hormonal screening (6%), vertigo (6%), cranial trauma (5%), and dummy run for clinical study (5%). After a structured analysis of T2 lesions, the suspected diagnosis was: inflammatory disease 45%, vascular 33%, non-pathological 19%, genetic 2%, and metabolic 1%. Extensive screening confirmed the proposed diagnosis in 97% of cases. Among all the 220 proposed RIS patients, only 35.4% fulfilled the 2010 McDonald criteria, and 8% can be categorized as RIS. Dissemination in time criteria was present for 82.7% of MS patients and 36% of RIS patients but none of the vascular or non-pathological T2 abnormalities.

Conclusion

Even if RIS was initially suspected on MRI, only a third of the patients had an inflammatory disease. Most of the patients had either non-specific T2 lesions or a non-inflammatory disease. Others were initially well categorized but had experienced clinical symptoms that could possibly be considered as a first clinical event. Overdiagnosis of MS can lead to propose an inappropriate disease-modifying therapy.
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