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Isolated Chorea Associated with LGI1 Antibody.
Ritesh A Ramdhani1, Steven J Frucht1
1Movement Disorders Division, Icahn School of Medicine at Mount Sinai, New York, New York, United States of America.
Leucine-rich glioma inactivated 1 (LGI1) antibody can cause chorea, a rare movement disorder. This case demonstrates that LGI1-related chorea is treatable with corticosteroids, offering a new therapeutic option.
Area of Science:
- Neurology
- Immunology
Background:
- Leucine-rich glioma inactivated 1 (LGI1) antibody is associated with limbic encephalitis, hyponatremia, and seizures.
- Parkinsonism, tremor, and chorea are rare LGI1 antibody manifestations, often accompanying limbic encephalitis symptoms.
Purpose of the Study:
- To report a case of LGI1 antibody-related isolated chorea.
- To suggest the role of LGI1 antibodies in triggering chorea and its response to treatment.
Main Methods:
- Case presentation of a 53-year-old Japanese male with isolated chorea.
- Treatment with high-dose corticosteroids.
Main Results:
- The patient's chorea significantly improved with high-dose steroid therapy.
- This suggests LGI1 antibody-mediated chorea is a treatable neurological condition.
Conclusions:
- LGI1 antibody-associated chorea represents a novel, treatable etiology for choreiform movement disorders.
- Corticosteroid therapy is effective in managing LGI1-related chorea.
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