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Living with Lissencephaly with cerebellar hypoplasia type A

A rare genetic brain condition with a smooth brain surface, thick outer brain layer, and a small cerebellum.

Understanding Lissencephaly with cerebellar hypoplasia type A

Lissencephaly with cerebellar hypoplasia type A is a rare genetic form of lissencephaly in which the brain surface is smooth and the cerebellum is underdeveloped.

The outer layer of the brain (cortex) is thickened, and the cerebellum, which coordinates movement, is smaller than usual, mostly in the middle part. It may be noticed during pregnancy or in newborns.

Signs & symptoms

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

  • Smooth brain surface (classical lissencephaly)
  • Thickened outer brain layer
  • Small cerebellum (cerebellar hypoplasia)

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 Child Neurology Foundation and other patient organizations
  • 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
Would genetic testing help find the cause?
Which specialists and therapies can support development?
What can brain imaging tell us about my child's condition?

Quick facts

Symptoms usually startduring Pregnancy and as a Newborn

GARD says the condition is genetic but doesn't name a gene or inheritance pattern.

GeneticNeurological

Also known as: lissencephaly co-occurrent with congenital cerebellar hypoplasia type a

Patient organizations

Source: NIH GARD · Lissencephaly with cerebellar hypoplasia type AGARD ID 19731 · 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 Lissencephaly with cerebellar hypoplasia type A.

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Explore research for Lissencephaly with cerebellar hypoplasia type A

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  • Recruiting studies from ClinicalTrials.gov
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  • Eligibility is confirmed by the study team

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