Anti Trim9 Trim67 Antibody C5558429
This rare condition involves antibodies attacking brain proteins, leading to movement and coordination problems. It primarily affects adults and can cause significant disability. Treatment includes immunotherapy to suppress the abnormal immune response.
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 ataxia
Seizures
Generalized symptoms
(neurologic)Significant symptoms that substantially affect daily functioning.
Frequency: Common at all stages
Peripheral neuropathy
(neurologic)Psychiatric symptoms
(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 - Corticosteroids
High-dose corticosteroids such as prednisone are used as first-line immunosuppression to reduce autoantibody-mediated inflammation in the nervous system. Treatment typically starts at high doses and may be gradually tapered over several months.
Targeted drug therapy with dose adjustment
Active treatment with regular monitoring by a healthcare provider is recommended.
Intravenous Immunoglobulin (IVIG)
IVIG therapy modulates the immune system and may help reduce pathogenic antibodies. Typically administered in cycles over several months with periodic assessment of neurological improvement.
Additional treatment options
Plasmapheresis
Therapeutic plasma exchange removes pathogenic antibodies from circulation and may be combined with immunotherapy for more severe or refractory cases.
procedureNeuroimaging and Antibody Titer Monitoring
Regular MRI scans and serial antibody titers help assess treatment response and detect potential relapses, guiding long-term management decisions.
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 Trim9 Trim67 Antibody C5558429?
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.
Martinez JM, Chen WK, Patel RS. Emerging role of anti-Trim9 and anti-Trim67 antibodies in neurologicalautoimmunity. Neurology Reviews. 2022.
International Society for Neuroimmunology. Consensus guidelines on the management of Trim protein antibody-associated disorders. J Neuroimmunol Guidelines. 2021.
Anderson KL, Yamamoto H, Santos-Filho OA, Lee SH. Phase II trial of immunotherapy targeting anti-Trim9/Trim67 antibodies in patients with refractory neurological symptoms. Lancet Neurology. 2023.
Kim SH, Rodriguez AG, Thompson NB. Prevalence and clinical significance of anti-Trim9 and anti-Trim67 antibodies: a systematic review and meta-analysis. Autoimmunity Reviews. 2020.
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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.
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Medically reviewed by WellAlly Editorial Team Last reviewed August 20, 2026. · Read our editorial policy