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Living with Mesial temporal lobe epilepsy with hippocampal sclerosis

A rare epilepsy with seizures starting in the inner part of the temporal lobe, linked to scarring in the hippocampus.

Understanding Mesial temporal lobe epilepsy with hippocampal sclerosis

Mesial temporal lobe epilepsy with hippocampal sclerosis is a rare epilepsy syndrome with seizures that start in the inner part of the brain's temporal lobe.

It includes scarring (sclerosis) of the hippocampus, usually on one side. It often follows an early event like febrile seizures, low oxygen, brain infection, or head injury in the first five years of life, then a period without seizures. Typical seizures begin with an aura, such as a rising stomach feeling, followed by lip smacking or chewing and staring. GARD says seizures are first easily controlled with medicine, then often become harder to control, with memory and behavior changes.

Signs & symptoms

GARD doesn't list a separate symptom list, but its summary describes these:

  • Seizures that begin with an aura (such as a rising stomach feeling)
  • Lip smacking, chewing, or other repeated movements
  • Staring or loss of awareness
  • Confusion after a seizure
  • Memory problems
  • Behavior changes over time

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

    Specialists who may be involved include brain and nervous system specialists, genetic specialists and seizure and epilepsy specialists.

  3. Ask which tests can help

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

  4. Connect with expert centers

    Epilepsy Foundation may keep lists of experts for this condition.

Care & treatment

Care team
Brain and nervous system specialists (neurologists); Genetic specialists (geneticists); Seizure and epilepsy specialists (epileptologist)
Expert care
Expert lists: Epilepsy Foundation
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 Epilepsy Foundation
  • 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
Which treatments are best when seizures stop responding to medicine?
Could surgery be an option for me?
How can memory and behavior changes be monitored?

Quick facts

Symptoms usually starta variety of ages

It is often linked to an early event like febrile seizures, low oxygen, brain infection, or head injury. Changes in genes (also called variants) are listed. GARD does not name a specific gene.

GeneticNeurological

Also known as: hippocampal sclerosis-related mesial temporal lobe epilepsy; hs-mtle; mtle-hs; mtle-hs - mesial temporal lobe epilepsy with hippocampal sclerosis

Patient organizations

Broader rare-disease groups

Source: NIH GARD · Mesial temporal lobe epilepsy with hippocampal sclerosisGARD ID 19684 · 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 Mesial temporal lobe epilepsy with hippocampal sclerosis.

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