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Limbic encephalitis and variants: classification, diagnosis and treatment.

Erdem Tüzün¹, Josep Dalmau

¹Division of Neuro-Oncology, Department of Neurology, Hospital of the University of Pennsylvania, Philadelphia, PA 19104, USA.

The Neurologist

|September 13, 2007

Summary

Autoimmune limbic encephalitis is increasingly recognized and treatable. Identifying specific antineuronal antibodies aids diagnosis and guides immunotherapy, improving patient outcomes for this neurological disorder.

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Published on: June 2, 2022

Area of Science:

Neurology
Immunology
Neuroimmunology

Background:

Autoimmune limbic encephalitis is increasingly diagnosed, with many patients improving after prompt treatment.
Recognition of antibodies targeting neuronal cell membrane antigens is crucial for understanding and managing this condition.
This review utilizes a clinical immunologic classification for autoimmune limbic encephalitis.

Purpose of the Study:

To provide a clinically useful immunologic classification of autoimmune limbic encephalitis.
To review disorders associated with antibodies to neuronal cell membrane antigens.
To differentiate limbic encephalitis subtypes based on antigen targets and clinical features.

Main Methods:

Review of recent studies on autoimmune limbic encephalitis.
Classification of limbic encephalitis based on antibody targets (intracellular vs. cell membrane antigens).
Analysis of clinical presentations, diagnostic findings (CSF, EEG, MRI), and treatment responses.

Main Results:

Limbic encephalitis typically presents with rapid memory loss, psychiatric symptoms, and seizures.
Patients often exhibit CSF inflammation, temporal lobe abnormalities on EEG/MRI, and antineuronal antibodies.
Antibodies against cell membrane antigens (e.g., VGKC, NMDA receptor) are associated with better immunotherapy response compared to intracellular antigen antibodies.

Conclusions:

Autoimmune limbic encephalitis is more common than previously thought.
Many cases are not associated with cancer and respond to treatment.
Distinguishing between antibody-driven subtypes is key for effective management.