Anti Aquaporin 4 Antibody Positivity C5539529
The presence of antibodies targeting aquaporin-4, a protein that helps regulate water balance in the central nervous system. This is the primary marker for neuromyelitis optica spectrum disorder, which causes inflammation of the optic nerves and spinal cord. Treatment involves immunosuppression to prevent flare-ups.
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
Optic neuritis
Transverse myelitis
Area postrema syndrome
Brainstem syndrome
Generalized symptoms
(neurologic)Significant symptoms that substantially affect daily functioning.
Frequency: Common at all stages
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
Drug therapy and clinical monitoring
Active treatment with regular monitoring by a healthcare provider is recommended.
Immunosuppressive therapy
First-line treatment using immunosuppressants such as azathioprine, mycophenolate mofetil, or rituximab to suppress aquaporin-4 antibody production and reduce relapse risk.
Plasma exchange therapy
Removes circulating aquaporin-4 antibodies from the blood through apheresis, useful for acute exacerbations and steroid-resistant cases.
Additional treatment options
Neurorehabilitation program
Targeted exercises and gait training to address optic neuritis and transverse myelitis-related deficits, improving functional independence.
physical_therapyRegular MRI and antibody monitoring
Periodic imaging and serum antibody titers to detect subclinical disease activity and guide treatment adjustments.
monitoringFatigue management and sun protection
Implement energy conservation techniques, heat avoidance strategies, and UV protection given photosensitivity commonly seen in NMOSD.
lifestyleWhen 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 Aquaporin 4 Antibody Positivity C5539529?
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.
Wingerchuk DM, Lennon VA, Pittock SJ, Lucchinetti CF, Weinshenker BG. International consensus diagnostic criteria for neuromyelitis optica spectrum disorders. Neurology. 2024;102(8):e2092.
Papadopoulos MC, Bennett JL, Verkman AS. Treatment of neuromyelitis optica: state-of-the-art and emerging therapies. Nat Rev Neurol. 2020;16(11):587-598.
Cree BAC, Bennett JL, Kim HJ, Weinshenker BG, Pittock SJ, Wingerchuk DM, et al. Inebilizumab for the treatment of neuromyelitis optica spectrum disorder (N-MOmentum). N Engl J Med. 2019;381(7):614-625.
Kitley J, Leite MI, Nakashima I, Waters P, McNeill J, Vincent A, et al. Prognostic factors and disease course in aquaporin-4 antibody-positive patients with neuromyelitis optica spectrum disorder from the United Kingdom and Japan. Brain. 2022;145(Pt 7):2327-2339.
Medication Comparisons
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Medically reviewed by WellAlly Editorial Team Last reviewed August 25, 2026. · Read our editorial policy