Lissencephaly Type 3 C1969029
A rare brain malformation where the brain surface is abnormally smooth due to faulty neuron migration during development. It typically affects infants and children, causing severe developmental delays. Treatment focuses on managing symptoms and providing supportive care.
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
Epilepsy
Generalized symptoms
(neurologic)Significant symptoms that substantially affect daily functioning.
Frequency: Common at all stages
Severe intellectual disability
(neurologic)Spasticity
(neurologic)Vision impairment
(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
Aggressive antiepileptic treatment
Comprehensive seizure management protocol for type 3 lissencephaly, which typically presents with severe epilepsy requiring multiple antiepileptic agents and careful titration.
Drug therapy and clinical monitoring
Active treatment with regular monitoring by a healthcare provider is recommended.
Intensive neurological monitoring
Close surveillance for seizure frequency, developmental regression, and neurological deterioration. Regular EEG monitoring and neuroimaging to assess disease progression.
Additional treatment options
Spasticity and contracture management
Physical therapy interventions to manage increased muscle tone, prevent contractures, and maintain functional mobility through stretching, positioning, and adaptive techniques.
physical_therapyDysphagia management and nutritional support
Evaluation and management of swallowing difficulties common in type 3 lissencephaly, including texture-modified diets and feeding assistance to ensure adequate nutrition.
dietaryVagus nerve stimulation evaluation
Surgical evaluation for vagus nerve stimulation as an adjunctive treatment for refractory seizures in patients who do not respond adequately to antiepileptic medications alone.
procedureWhen 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 Lissencephaly Type 3 C1969029?
Please consult a qualified healthcare professional for personalized medical information about this condition. [Content pending medical review.]
generalMedication Comparisons
Compare medications used to treat Lissencephaly Type 3 C1969029. See side-by-side comparisons of effectiveness, side effects, costs, and more.
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 27, 2026. · Read our editorial policy