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Immune-mediated ataxias.

Bastien Joubert1, Kevin Rostásy2, Jérôme Honnorat1

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|June 13, 2018
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Summary
This summary is machine-generated.

Immune-mediated cerebellar ataxia (CA) is a group of rare, underdiagnosed neurological disorders. Research is needed to understand the mechanisms and define optimal treatments for this condition.

Keywords:
acute cerebellitisanti-GAD antibodiesautoimmune cerebellar ataxiaopsoclonus-myoclonus syndromeparaneoplastic cerebellar degeneration

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Area of Science:

  • Neurology
  • Immunology
  • Rare Diseases

Background:

  • Immune-mediated cerebellar ataxia (CA) encompasses rare, often underdiagnosed neurological disorders.
  • These conditions can present with acute or progressive symptoms and include various syndromes like anti-GAD antibody-associated CA, Hashimoto encephalopathy, gluten ataxia, and paraneoplastic degenerations.
  • Autoimmune CA can be triggered by infections or occur alongside systemic autoimmune diseases.

Purpose of the Study:

  • To review the current understanding of immune-mediated cerebellar ataxia.
  • To highlight the diagnostic challenges and the need for differentiating autoimmune CA from other causes.
  • To emphasize the current gaps in knowledge regarding pathophysiology and optimal therapeutic strategies.

Main Methods:

  • Literature review of immune-mediated cerebellar ataxia syndromes.
  • Discussion of clinical presentations, associated autoantibodies, and triggers.
  • Analysis of diagnostic considerations, particularly in adults and children.

Main Results:

  • Several distinct syndromes of immune-mediated CA have been identified, often involving autoantibodies targeting neuronal antigens.
  • Diagnostic workup is crucial to exclude other causes, with paraneoplastic origins needing consideration in adults with subacute onset.
  • Neurologic outcomes are often poor in adults, while generally better in children, though exceptions exist.

Conclusions:

  • Immune-mediated CA is a complex group of disorders requiring further research into pathophysiology and treatment.
  • Optimal therapeutic strategies remain ill-defined, especially for adult patients with poor prognoses.
  • Continued investigation into both clinical and mechanistic aspects is essential for improving patient outcomes.