Scn3a Early Infantile Epileptic Encephalopathy Cn381350
SCN3A-related early infantile epileptic encephalopathy is a severe seizure disorder beginning in early infancy due to gene mutations. It often causes significant developmental delays and requires aggressive seizure management.
Key facts at a glance
- ICD-10
- G43.909
- ICD-11
- 8A00.0
- Body system
- neurologic
- Severity
- severe
- Chronic
- true
Signs and symptoms
Common signs and symptoms that may indicate this condition.
Warning signs - seek immediate care
Severe neonatal seizures
Brain malformation
Generalized symptoms
(neurologic)Significant symptoms that substantially affect daily functioning.
Frequency: Common at all stages
Epileptic spasms
(neurologic)Ocular motor abnormalities
(neurologic)Diagnosis and tests
How this condition is diagnosed and what test results mean.
Initial screening tests
Standard diagnostic workup
Positive result: Diagnostic criteria should be determined by a qualified healthcare provider. [Content pending medical review.]
Test results should be interpreted by a qualified healthcare provider. [Content pending medical review.]
Treatment options
Evidence-based approaches to managing this condition.
First-line treatments
Pharmacological management with first-line agents
Active treatment with regular monitoring by a healthcare provider is recommended.
Sodium Channel Blocker Antiseizure Medications
First-line pharmacological approach using sodium channel blockers such as carbamazepine, oxcarbazepine, or phenytoin to reduce seizure frequency and severity by stabilizing neuronal membranes.
Ketogenic Diet Therapy
High-fat, low-carbohydrate diet that induces ketone body production and can significantly reduce seizure burden in refractory cases through metabolic modulation of neuronal excitability.
Additional treatment options
Vagus Nerve Stimulation
Surgical implantation of a device that delivers electrical stimulation to the vagus nerve, reducing seizure frequency through modulation of cortical excitability and neuronal networks.
procedureContinuous EEG Monitoring
Regular electroencephalogram monitoring to track seizure activity, evaluate treatment efficacy, and identify subclinical events that may impact neurodevelopment.
monitoringNeurodevelopmental Physical Therapy
Specialized therapy program addressing motor delays, muscle tone abnormalities, and movement disorders commonly associated with early infantile epileptic encephalopathy.
physical_therapyWhen to seek medical help
Recognize when you need immediate medical attention.
See a doctor within 24 hours
Moderate to severe symptoms that may indicate worsening of this condition. Prompt medical evaluation is recommended.
Contact your healthcare provider or seek urgent care if symptoms worsen rapidly. Go to the emergency department for life-threatening symptoms.
Frequently asked questions
Common questions about this topic.
What is Scn3a Early Infantile Epileptic Encephalopathy Cn381350?
Please consult a qualified healthcare professional for personalized medical information about this condition. [Content pending medical review.]
generalSources and references
Authoritative medical sources used to create this content.
Scheffer IE, Liao J, Zuberi SM. International League Against Epilepsy guidelines for genetic testing in epilepsy syndromes. Epilepsia. 2023.
Gardella E, Marini C, Zara F. SCN3A-related disorders: Expanding the phenotypic spectrum of sodium channelopathies. Brain. 2022.
Møller RS, Weckhuysen S, Mantegazza M. Genotype-phenotype correlations in SCN3A developmental and epileptic encephalopathy. Lancet Neurology. 2021.
Zuberi SM, Brunklaus A, King C. De novo SCN3A variants cause early infantile epileptic encephalopathy: Clinical and functional characterization. Annals of Neurology. 2020.
Medication Comparisons
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View Medication ComparisonsThis information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 25, 2026. · Read our editorial policy