Lissencephaly 8 C4310646
A severe brain formation disorder where the brain surface lacks normal folds. It causes profound developmental delays and neurological problems. Care is supportive and focuses on managing complications.
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
Recurrent seizures
Generalized symptoms
(neurologic)Significant symptoms that substantially affect daily functioning.
Frequency: Common at all stages
Spastic quadriparesis
(neurologic)Feeding difficulty requiring tube feeding
(neurologic)Optic nerve hypoplasia
(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
Comprehensive seizure control
Aggressive antiepileptic drug management for lissencephaly-8, often requiring multiple medications and close titration to achieve adequate seizure control.
Targeted drug therapy with dose adjustment
Active treatment with regular monitoring by a healthcare provider is recommended.
Multidisciplinary care coordination
Coordinated care involving neurology, developmental pediatrics, gastroenterology, and other specialties to address the complex needs of patients with lissencephaly-8.
Additional treatment options
Vagus nerve stimulation evaluation
Surgical evaluation for vagus nerve stimulation as an adjunctive treatment for refractory seizures not controlled by medication alone.
surgicalDevelopmental and behavioral intervention
Behavioral and developmental therapies addressing cognitive delays, challenging behaviors, and promoting skill development appropriate to functional level.
psychologicalKetogenic diet consideration
Evaluation for ketogenic diet therapy as an alternative or adjunctive treatment for seizure control, particularly in medication-resistant cases.
dietaryWhen 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 8 C4310646?
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 8 C4310646. 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 20, 2026. · Read our editorial policy