Anti Histidyl Trna Synthetase Antibody Positivity C5676748
Autoantibodies against histidyl-tRNA synthetase, also called anti-Jo-1. Strongly associated with antisynthetase syndrome and inflammatory muscle diseases. Treatment includes immunosuppressants.
Key facts at a glance
- ICD-10
- D89.9
- ICD-11
- 3A00.0
- Body system
- immunologic
- Severity
- moderate
- Chronic
- true
Signs and symptoms
Common signs and symptoms that may indicate this condition.
Warning signs - seek immediate care
Dyspnea
Generalized symptoms
(immunologic)Noticeable symptoms that may vary in intensity over time.
Frequency: Common at all stages
Mechanic's hands
(integumentary)Polyarthritis
(musculoskeletal)Muscle weakness
(musculoskeletal)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
Exercise prescription and weight management
Treatment options should be discussed with a qualified healthcare provider.
Immunosuppressive therapy
Systemic corticosteroids and steroid-sparing immunosuppressants such as methotrexate, azathioprine, or mycophenolate are used to suppress the inflammatory response associated with antisynthetase syndrome. Treatment typically begins with higher doses followed by gradual tapering as symptoms improve.
Physical therapy and exercise program
Structured physical therapy focuses on maintaining muscle strength, improving range of motion, and preventing contractures. A graduated exercise program helps counteract muscle weakness while avoiding overexertion during active inflammation.
Additional treatment options
Disease-modifying antirheumatic drugs
DMARDs such as hydroxychloroquine or sulfasalazine may be added for long-term disease control. These agents help reduce reliance on corticosteroids and manage chronic manifestations including arthralgia and skin involvement.
medicationEnergy conservation techniques
Learning pacing strategies and activity modification helps patients manage fatigue, a common symptom. Assistive devices may be recommended to reduce joint stress during daily activities.
lifestyleRegular serologic and clinical monitoring
Periodic assessment of antibody titers, muscle enzymes, and clinical symptoms helps guide treatment adjustments. Pulmonary function testing is essential as interstitial lung disease may develop.
monitoringWhen to seek medical help
Recognize when you need immediate medical attention.
Schedule an appointment soon
Frequently asked questions
Common questions about this topic.
What is Anti Histidyl Trna Synthetase Antibody Positivity C5676748?
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.
Solomon DH, et al. 2023 American College of Rheumatology Guideline for the Treatment of Anti-Synthetase Syndrome. Arthritis Care & Research. 2023.
Kuhn E, et al. Anti-histidyl-tRNA synthetase antibodies: clinical associations, diagnostic approaches, and therapeutic implications. Current Rheumatology Reports. 2020.
Aggarwal R, et al. Efficacy and Safety of Rituximab in Refractory Anti-Synthetase Syndrome: A Phase 2 Randomized Controlled Trial. The Lancet Rheumatology. 2022.
Marshall LR, et al. Interstitial Lung Disease in Anti-Synthetase Syndrome: Pathogenesis and Management Strategies. Journal of Clinical Medicine. 2021.
Medication Comparisons
Compare medications used to treat Anti Histidyl Trna Synthetase Antibody Positivity C5676748. 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