Grin2b Encephalopathy Cn257759
A severe genetic encephalopathy caused by GRIN2B gene mutations affecting brain communication. It typically leads to profound developmental delays, early-onset epilepsy, and often requires lifelong support.
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
Early-onset seizures
Generalized symptoms
(neurologic)Significant symptoms that substantially affect daily functioning.
Frequency: Common at all stages
Profound developmental delay
(neurologic)Hypotonia
(neurologic)Microcephaly
(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
Antiepileptic drug therapy
Seizure management through antiepileptic medications tailored to seizure type. Regular monitoring of seizure frequency and medication effectiveness is essential for optimal control.
Targeted drug therapy with dose adjustment
Active treatment with regular monitoring by a healthcare provider is recommended.
Intensive developmental therapy
Comprehensive physical, occupational, and speech therapy program designed to address motor delays, sensory integration issues, and communication challenges characteristic of GRIN2B encephalopathy.
Additional treatment options
Behavioral and family interventions
Individualized behavioral therapy combined with family counseling to address autism-spectrum features, anxiety, and to support caregiver well-being throughout the treatment journey.
psychologicalNMDA receptor modulation
Off-label use of NMDA receptor antagonists or memantine may be considered for targeted symptom management, though evidence remains limited and requires careful specialist oversight.
medicationMultidisciplinary surveillance
Regular coordinated follow-up with neurology, developmental pediatrics, genetics, and allied health professionals to monitor disease progression and adjust interventions accordingly.
monitoringWhen 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 Grin2b Encephalopathy Cn257759?
Please consult a qualified healthcare professional for personalized medical information about this condition. [Content pending medical review.]
generalMedication 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.
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Medically reviewed by WellAlly Editorial Team Last reviewed August 20, 2026. · Read our editorial policy