Anti Neurexin 3alpha Antibody Positivity C5558421
A rare neurological condition involving antibodies against neurexin proteins, which are important for nerve cell communication. Research is ongoing to understand its effects.
Key facts at a glance
- ICD-10
- G43.909
- ICD-11
- 8A00.0
- Body system
- neurologic
- Severity
- severe
- Chronic
- false
Signs and symptoms
Common signs and symptoms that may indicate this condition.
Warning signs - seek immediate care
Seizures
Encephalopathy
Focal neurological deficit
Generalized symptoms
(neurologic)Significant symptoms that substantially affect daily functioning.
Frequency: Varies
Psychiatric manifestations
(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
Immunotherapy with corticosteroids
First-line immunotherapy using high-dose corticosteroids to suppress the autoimmune inflammation associated with anti-neurexin-3alpha antibody-mediated neurological dysfunction. Treatment typically begins with IV methylprednisolone followed by oral taper.
Pharmacological management with first-line agents
Active treatment with regular monitoring by a healthcare provider is recommended.
Additional treatment options
Antiseizure medications
Symptomatic treatment with antiepileptic drugs addresses seizure activity that may occur with neurexin-3alpha antibody-associated encephalitis. Drug selection is based on seizure type and drug interaction profile.
medicationCognitive rehabilitation therapy
Targeted cognitive rehabilitation addresses memory deficits, attention difficulties, and executive function impairments commonly seen in antibody-mediated encephalitis. Interventions include compensatory strategies and restorative techniques.
psychologicalIntravenous immunoglobulin therapy
IVIG provides broad immunomodulation and may help neutralize pathogenic antibodies while modulating immune cell function in neurexin-3alpha antibody positivity.
procedureAntibody titers and neurological monitoring
Serial measurement of anti-neurexin-3alpha antibody levels combined with regular neurological examinations helps assess treatment response and predict relapse risk over time.
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 Anti Neurexin 3alpha Antibody Positivity C5558421?
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.
Graus F, Titulaer MJ, Balu R, et al. A clinical approach to diagnosis of autoimmune encephalitis. Lancet Neurol. 2016.
Dalmau J, Gleichman AJ, Hughes EG, et al. Anti-NMDA-receptor encephalitis: case series and analysis of the effects of antibodies. Lancet Neurol. 2008.
Leypoldt F, Buchert R, Kleiter I, et al. Antibodies against neural antigens: clinical correlates and diagnostic approach. Curr Neurol Neurosci Rep. 2015.
Abboud H, Rossi C, Eissa A, et al. Autoimmune encephalitis: a comprehensive review of antibody-mediated syndromes and treatment outcomes. Neurology. 2021.
Medication Comparisons
Compare medications used to treat Anti Neurexin 3alpha Antibody Positivity C5558421. 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