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Plasma exchange in stiff-man syndrome.
1Department of Pathology, University of Miami/Jackson Memorial Medical Center, Florida 33101, USA.
Summary
Plasma exchange (PE) offers limited benefit for Stiff-man syndrome (SMS) patients lacking GAD autoantibodies. This rare neurological disorder
Area of Science:
- Neurology
- Immunology
Background:
- Stiff-man syndrome (SMS) is a rare neurological disorder.
- Characterized by involuntary rigidity and continuous motor unit activity.
- Autoantibodies to glutamic acid decarboxylase (GAD) are implicated in 60% of cases.
Observation:
- This study reports on two patients with SMS negative for GAD autoantibodies.
- Plasma exchange (PE) was used as a treatment modality.
- Clinical outcomes were assessed post-treatment.
Findings:
- One patient experienced minimal clinical improvement after PE.
- The second patient reported subjective improvement, comparable to medication effects.
- Results suggest autoantibody-negative SMS patients may respond less favorably to PE.
Implications:
- Plasma exchange may not be an effective treatment for Stiff-man syndrome patients without GAD autoantibodies.
- Further research is needed to explore alternative or aggressive PE strategies.
- Understanding autoantibody status is crucial for guiding SMS treatment decisions.