2017 McDonald criteria for multiple sclerosis: Earlier diagnosis with reduced specificity?

Francesca Gobbin1, Mattia Zanoni1, Antonio Marangi1

  • 1Department of Neuroscience, Biomedicine and Movement Sciences, University of Verona and Neurology Unit B, Azienda Ospedaliera Universitaria Integrata Verona, Piazzale L.A. Scuro, 10 37134 Verona, Italy.

Abstract

Insights

The 2017 McDonald criteria for multiple sclerosis (MS) diagnosis demonstrate higher sensitivity in identifying patients with an initial demyelinating event (IDE). However, these criteria show reduced specificity compared to the 2010 criteria.

Area of Science:

  • Neurology
  • Diagnostic Criteria
  • Neuroimmunology

Background:

  • The McDonald criteria are essential for diagnosing multiple sclerosis (MS).
  • The criteria were updated in 2017, necessitating an evaluation of their diagnostic performance.
  • Previous iterations of the criteria have been refined to improve MS diagnosis.

Purpose of the Study:

  • To compare the diagnostic accuracy of the 2017 McDonald criteria against the 2010 criteria.
  • To assess the sensitivity and specificity of both 2017 and 2010 McDonald criteria.
  • To evaluate these criteria in patients experiencing an initial demyelinating event (IDE).

Main Methods:

  • Retrospective analysis of patients presenting with an initial demyelinating event (IDE).
  • Collection of clinical, MRI, and cerebrospinal fluid (CSF) data.
  • Assessment of diagnostic fulfillment based on both 2010 and 2017 McDonald criteria.

Main Results:

  • The 2017 McDonald criteria achieved 100% sensitivity (95% CI: 86.8-100%).
  • Specificity for the 2017 criteria was 13.8% (95% CI: 3.9-31.7%).
  • The 2017 criteria demonstrated higher sensitivity but lower specificity than the 2010 criteria.

Conclusions:

  • The 2017 McDonald criteria offer improved sensitivity for diagnosing MS after an IDE.
  • A trade-off exists, with the 2017 criteria showing decreased specificity compared to the 2010 criteria.
  • Further research may be needed to optimize the specificity of the 2017 McDonald criteria.