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Living with Early-infantile DEE

A brain condition in babies with seizures starting in the first three months of life and ongoing problems with brain function.

Understanding Early-infantile DEE

Early-infantile DEE is a neurological condition with recurring seizures that begin within the first three months of life.

DEE stands for developmental and epileptic encephalopathy. Brain function gets worse over time. A brain wave test (EEG) shows a pattern of low activity alternating with bursts of high, spiky activity.

Signs & symptoms

GARD doesn't list specific symptoms for this condition separately, but the summary describes these features:

  • Recurring seizures in the first three months of life
  • Progressive problems with brain function
  • Abnormal pattern on EEG (brain wave test)

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
Would genetic testing help find the cause of the seizures?
What seizure treatments are available?
How can we support my child's development?

Quick facts

GARD says changes in a person's genes cause this condition. It doesn't list a specific gene.

GeneticNeurological

Also known as: early infantile epileptic encephalopathy; early infantile epileptic encephalopathy with burst-suppression; early infantile epileptic encephalopathy with suppression bursts; early infantile epileptic encephalopathy with suppression-bursts; early myoclonic encephalopathy; early myoclonic encephalopathy with suppression-bursts

Patient organizations

Broader rare-disease groups

Source: NIH GARD · Early-infantile DEEGARD ID 27299 · 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 Early-infantile DEE.

Explore the Early-infantile DEE blog

Explore research for Early-infantile DEE

Explore actively recruiting Early-infantile DEE studies with HealthSpark.

HealthSpark

Find actively recruiting studies for Early-infantile DEE with HealthSpark. Share your city to explore research near you.

  • Recruiting studies from ClinicalTrials.gov
  • Share your city to look for research near you
  • Eligibility is confirmed by the study team

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Powered by HealthSpark, our AI chat helper · Study information from ClinicalTrials.gov · Eligibility is confirmed by the study team.

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