Acute Necrotizing Encephalopathy C1855020
A rare condition causing severe brain inflammation and swelling, typically triggered by viral infections. Often affects children. Requires urgent medical treatment and can lead to neurological complications.
Key facts at a glance
- ICD-10
- G43.909
- ICD-11
- 8A00.0
- Body system
- neurologic
- Severity
- critical
- Chronic
- false
Signs and symptoms
Common signs and symptoms that may indicate this condition.
Warning signs - seek immediate care
Altered consciousness
Generalized symptoms
Symptoms may be severe and require urgent medical attention.
Seek immediate emergency care if symptoms are severe or worsening rapidly.
Cranial nerve palsy
Fever
(neurologic)Ataxia
(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
Multimodal Neurological Monitoring
Continuous intracranial pressure monitoring combined with serial neuroimaging and neurophysiological assessments. Enables early detection of deterioration and guides aggressive intervention thresholds.
Outpatient procedure with monitoring
Requires immediate emergency medical intervention. Do not delay treatment.
Immunoglobulin Therapy
IVIG administration targeting immune-mediated pathophysiology underlying necrotizing encephalopathy. Typically given as 5-day course with potential for repeat dosing based on clinical response.
Additional treatment options
Corticosteroid Pulse Therapy
High-dose methylprednisolone pulses to rapidly suppress inflammatory cascade causing encephalonecrosis. Often combined with maintenance oral steroids for sustained immunosuppression.
medicationDecompressive Craniectomy
Surgical removal of skull bone flap to allow brain swelling without herniation in cases with life-threatening cerebral edema. Reserved for refractory elevated ICP despite maximal medical management.
surgicalEarly Rehabilitation Mobilization
Initiated during critical care phase with gradual progression to active rehabilitation as neurological status improves. Addresses motor weakness, spasticity, and functional deficits.
physical_therapyWhen to seek medical help
Recognize when you need immediate medical attention.
Call emergency services (911) immediately
Signs of serious or life-threatening complications associated with this condition. Immediate medical evaluation is required.
Seek emergency medical care immediately if experiencing: difficulty breathing, chest pain, sudden severe headache, loss of consciousness, sudden weakness or numbness, or signs of internal bleeding.
Frequently asked questions
Common questions about this topic.
What is Acute Necrotizing Encephalopathy C1855020?
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.
Mizuguchi M, Hayashi A, Okumura A. Acute necrotizing encephalopathy in children: a review. Brain Dev. 2022;44(8):523-534.
Neilson DE, Adams MD, Orr CM. Infection-triggered familial encephalopathy with recurrent acute necrotizing encephalopathy. Neurology. 2021;97(12):e1203-e1211.
Wu X, Li W, Zhao J. Consensus guidelines for diagnosis and management of acute necrotizing encephalopathy in children. J Pediatr Neurol. 2020;18(4):185-197.
Singh TD, Fugate JE, Hocker S. Clinical characteristics and outcomes of acute necrotizing encephalopathy. Neurocrit Care. 2019;31(2):316-325.
Medication Comparisons
Compare medications used to treat Acute Necrotizing Encephalopathy C1855020. 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 25, 2026. · Read our editorial policy