Trends and tenets in relapsing and progressive opsoclonus-myoclonus syndrome

Brain & Development
M R Pranzatelli, E D Tate

Abstract

Despite advances in inducing remission in pediatric opsoclonus-myoclonus syndrome (OMS), relapse remains a challenge. By definition, relapse is not a characteristic of monophasic OMS, but occurs at any time in the course of multiphasic OMS. Due to variability and heterogeneity, patients are best approached and treated on a case-by-case basis, using precepts derived from clinical and scientific studies. Treatment of provocations, such as infection or immunotherapy tapering, is the short-term goal, but discovering unresolved neuroinflammation and re-configuring disease-modifying agents is crucial in the long-term. The working hypothesis is that much of the injury in OMS results from neuroinflammation involving dysregulated B cells, which may cause loss of tolerance and autoantibody production. Biomarkers of disease activity include cerebrospinal fluid (CSF) B cell frequency, oligoclonal bands (OCB), B cell attractants (CXCL13) and activating factors (BAFF). Measuring these markers comprises modern detection and characterization of neuroinflammation or verifies 'no evidence of disease activity'. The decision making process is three-tiered: deciding if the relapse is bone fide, identifying its etiology, and formulating a therapeuti...Continue Reading

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