Infantile epileptic-dyskinetic encephalopathy

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ORPHA:364063OMIM:308350G40.4
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1Active trials1Specialists8Treatment centers

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UniteRare data is sourced from FDA.gov, ClinicalTrials.gov, Orphanet, OMIM, and NORD.
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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

Inheritance

Variable

Can be inherited in different ways depending on the underlying gene

Age of Onset

Infantile

Begins in infancy, roughly 1 month to 2 years old

Orphanet ↗OMIM ↗NORD ↗

FDA & Trial Timeline

1 event
Feb 2025A Study to Investigate LP352 in Children and Adults With Developmental and Epileptic Encephalopathy (DEE)

Longboard Pharmaceuticals — PHASE3

TrialENROLLING BY INVITATION

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 →

Clinical Trials

1 recruitingView all trials with filters →
Phase 31 trial
A Study to Investigate LP352 in Children and Adults With Developmental and Epileptic Encephalopathy (DEE)
Phase 3
Enrolling by Invitation
· Sites: Little Rock, Arkansas; Los Angeles, California +14 more · Age: 266 yrs

Specialists

1 foundView all specialists →
RM
Rena Gale, MD
Specialist
PI on 1 active trial

Treatment Centers

8 centers
🏥 NORD

Baylor College of Medicine Rare Disease Center

Baylor College of Medicine

📍 Houston, TX

🏥 NORD

Stanford Medicine Rare Disease Center

Stanford Medicine

📍 Stanford, CA

🔬 UDN

NIH Clinical Center Undiagnosed Diseases Program

National Institutes of Health

📍 Bethesda, MD

🔬 UDN

UCLA UDN Clinical Site

UCLA Health

📍 Los Angeles, CA

🔬 UDN

Baylor College of Medicine UDN Clinical Site

Baylor College of Medicine

📍 Houston, TX

🔬 UDN

Harvard/MGH UDN Clinical Site

Massachusetts General Hospital

📍 Boston, MA

🏥 NORD

Mayo Clinic Center for Individualized Medicine

Mayo Clinic

📍 Rochester, MN

👤 Mayo Clinic Center for Individualized Medicine

🏥 NORD

UCLA Rare Disease Day Program

UCLA Health

📍 Los Angeles, CA

Travel Grants

No travel grants are currently matched to Infantile epileptic-dyskinetic encephalopathy.

Search all travel grants →NORD Financial Assistance ↗

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Caregiver Resources

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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.