Does CSF pleocytosis have a predictive value for disease course in MS?

Itay Lotan1, Felix Benninger1, Rom Mendel1

  • 1Neuro-Immunology Service and Department of Neurology (I.L., M.A.H.), Rabin Medical Center; Department of Neurology (I.L., F.B., R.M., M.A.H., I.S.), Rabin Medical Center; and Sackler Faculty of Medicine (I.L., F.B., R.M., M.A.H., I.S.), Tel Aviv University, Israel.

Abstract

Insights

Cerebrospinal fluid (CSF) pleocytosis in multiple sclerosis (MS) patients indicates a higher relapse rate and faster disability progression. This finding suggests CSF pleocytosis is an unfavorable prognostic marker for MS disease course.

Area of Science:

  • Neurology
  • Immunology
  • Clinical Medicine

Background:

  • Multiple sclerosis (MS) is a central nervous system demyelinating disorder with variable clinical presentations and prognoses.
  • Current prognostic factors for MS are limited, lacking specific biological markers to guide treatment.
  • The impact of cerebrospinal fluid (CSF) pleocytosis on MS clinical course and prognosis remains unclear.

Purpose of the Study:

  • To investigate the association between CSF pleocytosis at initial presentation and the clinical course of MS.
  • To determine if CSF pleocytosis serves as a predictive marker for MS disease progression.

Main Methods:

  • Retrospective evaluation of 114 MS patients who underwent lumbar puncture at diagnosis.
  • Analysis included CSF cell count, clinical diagnosis (CIS/RRMS), annualized relapse rate (ARR), and Expanded Disability Status Scale (EDSS) progression.
  • Comparison of outcomes between patients with and without CSF pleocytosis (≥5 cells/μL vs. <4 cells/μL).

Main Results:

  • Forty-six patients (40%) presented with CSF pleocytosis.
  • Patients with CSF pleocytosis exhibited a significantly higher ARR (0.60 vs. 0.48, p=0.0267).
  • Pleocytosis was associated with a steeper EDSS score increase over the follow-up period (r²=0.04, p=0.0251).

Conclusions:

  • CSF pleocytosis at initial MS presentation is linked to a more aggressive disease course.
  • Elevated CSF cell counts may serve as an unfavorable biological predictive factor in MS.
  • These findings highlight the prognostic value of CSF analysis in managing MS patients.

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