Overview
Infantile epileptic-dyskinetic encephalopathy is a rare and severe brain disorder that begins in infancy. It is characterized by a combination of difficult-to-control seizures (epilepsy) and abnormal involuntary movements (dyskinesia), along with significant problems in brain development and function (encephalopathy). Babies with this condition typically appear normal at birth but begin showing symptoms within the first months of life. Seizures may take many forms, including sudden jerking movements, stiffening episodes, or subtle changes in awareness. The dyskinetic movements can include twisting, writhing, or repetitive motions that the child cannot control. This condition leads to serious developmental delays, meaning children often do not reach milestones like sitting, crawling, or speaking on time, and many have profound intellectual disability. Some children may also have trouble feeding, low muscle tone, or visual impairment. The combination of seizures and movement problems makes this condition particularly challenging to manage. Treatment is primarily supportive and aimed at controlling seizures with anti-seizure medications, though many children have drug-resistant epilepsy, meaning their seizures do not respond well to standard treatments. Physical therapy, occupational therapy, and nutritional support are important parts of care. In some cases, the underlying genetic cause may guide more targeted treatment approaches, but there is currently no cure for this condition.
Key symptoms:
Seizures that are hard to control with medicationInvoluntary twisting or writhing movements (dyskinesia)Severe developmental delayIntellectual disabilityLow muscle tone (floppiness) in early infancyDifficulty feeding or swallowingPoor head controlInability to sit, stand, or walk independentlyLimited or absent speechAbnormal eye movements or visual impairmentIrritability or excessive cryingEpisodes of stiffening of the bodyJerking movements of the arms and legsSleep disturbances
Variable
Can be inherited in different ways depending on the underlying gene
Infantile
Begins in infancy, roughly 1 month to 2 years old
FDA & Trial Timeline
1 eventLongboard Pharmaceuticals — PHASE3
Data sourced from FDA regulatory filings and ClinicalTrials.gov. Updated periodically.
Treatments
No FDA-approved treatments are currently listed for Infantile epileptic-dyskinetic encephalopathy.
1 clinical trialare actively recruiting — trials can provide access to cutting-edge therapies.
View clinical trials →Treatment Centers
8 centersBaylor College of Medicine Rare Disease Center ↗
Baylor College of Medicine
📍 Houston, TX
🏥 NORDStanford Medicine Rare Disease Center ↗
Stanford Medicine
📍 Stanford, CA
🔬 UDNNIH Clinical Center Undiagnosed Diseases Program ↗
National Institutes of Health
📍 Bethesda, MD
🔬 UDNUCLA UDN Clinical Site ↗
UCLA Health
📍 Los Angeles, CA
🔬 UDNBaylor College of Medicine UDN Clinical Site ↗
Baylor College of Medicine
📍 Houston, TX
🔬 UDNHarvard/MGH UDN Clinical Site ↗
Massachusetts General Hospital
📍 Boston, MA
🏥 NORDMayo Clinic Center for Individualized Medicine ↗
Mayo Clinic
📍 Rochester, MN
👤 Mayo Clinic Center for Individualized Medicine
🏥 NORDUCLA Rare Disease Day Program ↗
UCLA Health
📍 Los Angeles, CA
Travel Grants
No travel grants are currently matched to Infantile epileptic-dyskinetic encephalopathy.
Community
No community posts yet. Be the first to share your experience with Infantile epileptic-dyskinetic encephalopathy.
Start the conversation →Latest news about Infantile epileptic-dyskinetic encephalopathy
No recent news articles for Infantile epileptic-dyskinetic encephalopathy.
Follow this condition to be notified when news becomes available.
Caregiver Resources
NORD Caregiver Resources
Support, advocacy, and financial assistance for caregivers of rare disease patients.
Mental Health Support
Rare disease caregiving can be isolating. Connect with counseling and peer support.
Family & Caregiver Grants
Financial assistance programs specifically for caregivers of rare disease patients.
Social Security Disability
Learn how rare disease patients may qualify for SSDI/SSI benefits.
Questions for your doctor
Bring these to your next appointment
- Q1.What is the specific genetic cause of my child's condition, and does it change the treatment approach?,What seizure medications are most likely to help, and what are their side effects?,Should we consider a ketogenic diet or other non-medication approaches for seizure control?,What therapies are available to help with the involuntary movements?,Are there any clinical trials or emerging treatments that my child might be eligible for?,What is the long-term outlook for my child's development and quality of life?,What emergency plan should we have in place for prolonged seizures?
Common questions about Infantile epileptic-dyskinetic encephalopathy
What is Infantile epileptic-dyskinetic encephalopathy?
Infantile epileptic-dyskinetic encephalopathy is a rare and severe brain disorder that begins in infancy. It is characterized by a combination of difficult-to-control seizures (epilepsy) and abnormal involuntary movements (dyskinesia), along with significant problems in brain development and function (encephalopathy). Babies with this condition typically appear normal at birth but begin showing symptoms within the first months of life. Seizures may take many forms, including sudden jerking movements, stiffening episodes, or subtle changes in awareness. The dyskinetic movements can include twis
At what age does Infantile epileptic-dyskinetic encephalopathy typically begin?
Typical onset of Infantile epileptic-dyskinetic encephalopathy is infantile. Age of onset can vary across affected individuals.
Are there clinical trials for Infantile epileptic-dyskinetic encephalopathy?
Yes — 1 recruiting clinical trial is currently listed for Infantile epileptic-dyskinetic encephalopathy on UniteRare. See the clinical trials section on this page for phase, sponsor, and site details sourced from ClinicalTrials.gov.
Which specialists treat Infantile epileptic-dyskinetic encephalopathy?
1 specialists and care centers treating Infantile epileptic-dyskinetic encephalopathy are listed on UniteRare, sourced from ClinicalTrials.gov principal investigators, published research, and the NPPES NPI registry.