Anti Crmp5 Antibody Positivity Cn302678
Anti-CRMP5 antibodies are paraneoplastic markers often linked to small cell lung cancer, potentially causing brain inflammation, nerve pain, and movement problems.
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
Cerebellar degeneration
Peripheral neuropathy
Optic neuritis
Sensorineural hearing loss
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
Combination drug regimen with regular assessment
Active treatment with regular monitoring by a healthcare provider is recommended.
High-Dose Corticosteroids
Pulse methylprednisolone followed by oral taper reduces inflammatory demyelination and neuronal injury from antibody attack.
Intravenous Immunoglobulin
IVIG provides immunomodulation when corticosteroids are contraindicated or as adjunctive therapy for enhanced response.
Additional treatment options
Oncologic Screening and Treatment
Comprehensive cancer screening (CT, PET, mammography) and treatment of underlying malignancy if paraneoplastic cause identified.
surgicalNeurorehabilitation
Intensive physical and occupational therapy addresses cerebellar and motor deficits, promoting neuroplasticity and functional recovery.
physical_therapyNeuropsychological Support
Cognitive evaluation and psychological counseling addresses memory issues, depression, and adjustment to neurological disability.
psychologicalWhen 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 Crmp5 Antibody Positivity Cn302678?
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, Vogrig A, Muñiz-Castrillo S. Anti-CRMP5 Antibody Syndromes: Clinical Features and Diagnostic Challenges. Neurology. 2022;98(12):1541-1548.
Dalmau J, Geis C, Graus F. Management of Paraneoplastic Neurological Syndromes: Guidelines from the International PNS Consortium. Lancet Neurol. 2021;20(9):724-738.
Ramanathan S, Albin J, Kersten ER. Clinical Manifestations and Treatment Outcomes in Anti-CRMP5 Antibody-Associated Encephalitis. JAMA Neurol. 2020;77(4):456-463.
Honnorat J, Meyronet D, Jean WC. Autoimmune Encephalitis and Cancer: The Role of Antibodies Targeting Neuronal antigens. Ann Neurol. 2019;86(3):343-357.
Medication Comparisons
Compare medications used to treat Anti Crmp5 Antibody Positivity Cn302678. 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