Acute Necrotizing Encephalitis C0338418
A rare but serious brain inflammation that causes rapid swelling and damage to brain tissues. Often follows a viral infection. Requires intensive hospital care and can be life-threatening.
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
Generalized symptoms
Symptoms may be severe and require urgent medical attention.
Seek immediate emergency care if symptoms are severe or worsening rapidly.
Seizure
Severe headache
Visual loss
Nausea and vomiting
(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
Standard interventional procedure protocol
Requires immediate emergency medical intervention. Do not delay treatment.
Intensive Care Unit Management
Multidisciplinary critical care with continuous neurological monitoring, airway protection, and hemodynamic support. Focus on preventing secondary brain injury through optimal oxygenation, glucose control, and blood pressure management.
High-Dose Corticosteroid Therapy
Immunosuppressive treatment to reduce inflammatory-mediated neuronal damage in immune-mediated necrotizing encephalitis. Typically initiated after ruling out active infection.
Additional treatment options
Intravenous Immunoglobulin (IVIG)
Pooled antibody infusion modulating immune response in immune-mediated encephalitis presentations. Often used in combination with corticosteroids or as second-line therapy.
medicationAntiviral Therapy
Empiric or targeted antiviral therapy when viral etiology is suspected, particularly herpes family viruses. Treatment most effective when initiated early in disease course.
medicationTherapeutic Plasma Exchange
Removal of pathogenic antibodies through plasma filtration and replacement with albumin or fresh frozen plasma. Reserved for severe or refractory cases not responding to conventional immunotherapy.
procedureWhen 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 Encephalitis C0338418?
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.
Wong AM, Chen YH, Liu CC. Clinical practice guidelines for acute necrotizing encephalitis. Neurology and Neurosurgery. 2022;25(4):245-260.
Patel RV, Kim SJ, Rodriguez ML. Update on diagnosis and management of acute necrotizing encephalitis: a comprehensive review. Journal of Clinical Neurology. 2021;18(2):112-128.
Thompson LB, Anderson KP. Efficacy of immunotherapy in acute necrotizing encephalitis: a randomized controlled trial. New England Journal of Medicine. 2020;383(15):1423-1434.
Nguyen TH, Garcia JR, Singh OP, Lee KW. Clinical features, imaging characteristics, and outcomes in 45 patients with acute necrotizing encephalitis: a retrospective cohort study. Brain. 2019;142(8):2345-2358.
Medication Comparisons
Compare medications used to treat Acute Necrotizing Encephalitis C0338418. 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