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Living with Limbic encephalitis with LGI1 antibodies

A rare immune condition of the brain causing memory and thinking changes, psychiatric symptoms, and seizures.

Understanding Limbic encephalitis with LGI1 antibodies

Limbic encephalitis with LGI1 antibodies is a rare neuroimmunological disorder in which LGI1 antibodies are found in the blood or spinal fluid.

It begins with declining thinking skills, psychiatric changes, and seizures, especially a type called faciobrachial dystonic seizures. People may have confusion, hallucinations, paranoia, or aggressive outbursts, and persistent low blood sodium. It is most often not linked to a tumor, but tumors have been reported.

Signs & symptoms

GARD doesn't list a symptom list for this condition. Its summary describes these features:

  • Decline in thinking and memory
  • Psychiatric changes
  • Seizures (faciobrachial dystonic seizures)
  • Confusion
  • Hallucinations
  • Persistent low blood sodium

Not everyone has every symptom. GARD's list comes from the Human Phenotype Ontology.

Diagnosis

  1. Talk with your doctor

    Share the symptoms you've noticed, when they started and your family health history. Notes and photos can help.

  2. See a specialist

    Your doctor may refer you to a specialist who knows rare conditions.

  3. Ask which tests can help

    Your care team will decide which exams and tests can confirm the diagnosis.

Care & treatment

Care team
A doctor familiar with rare conditions, plus specialists as needed
Expert care
Ask about multidisciplinary care centers for rare conditions
Treatment
GARD doesn't list specific treatments for this condition. Your care team will tailor care to your symptoms.
Research
Clinical trials and observational studies may be options. See the research section below.

General information, not medical advice. Your care team makes the decisions.

Everyday life

Living with a rare condition is easier with support.

  • Connect with Encephalitis411
  • Keep notes on symptoms, changes and questions for appointments
  • Ask about patient registries that help research
  • Look into financial aid and travel resources for care visits
Bring these questions to your next doctor visit
Should I be checked for an underlying tumor?
Which antibody tests confirm this diagnosis?
Which neurology specialists should follow my care?

Quick facts

GARD describes it as an immune condition with LGI1 antibodies. It is most often not linked to a tumor, but tumors such as small cell lung cancer and thymoma have been reported.

Also known as: limbic encephalitis with leucine-rich glioma-inactivated 1 antibodies

Patient organizations

Source: NIH GARD · Limbic encephalitis with LGI1 antibodiesGARD ID 13406 · GARD page updated September 2026 · Plain-language summary by Know Rare; editorial review pending. General information, not medical advice.

You are more than your diagnosis

Perspectives from people navigating life with Limbic encephalitis with LGI1 antibodies.

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