Anti 3 Hydroxy 3 Methylglutaryl Coa Reductase Antibody Positivity C5539770
The presence of antibodies targeting HMG-CoA reductase, an enzyme involved in cholesterol production. This antibody is associated with an immune-mediated muscle disease causing weakness and inflammation. Treatment requires immunosuppression, and patients often need to stop statins.
Key facts at a glance
- ICD-10
- D89.9
- ICD-11
- 3A00.0
- Body system
- immunologic
- Severity
- severe
- Chronic
- true
Signs and symptoms
Common signs and symptoms that may indicate this condition.
Generalized symptoms
(immunologic)Significant symptoms that substantially affect daily functioning.
Frequency: Common at all stages
Proximal muscle weakness
(musculoskeletal)Muscle pain (myalgia)
(musculoskeletal)Elevated serum creatine kinase
(musculoskeletal)Functional impairment (difficulty climbing stairs)
(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
Immunosuppressive therapy
High-dose corticosteroids as first-line treatment often combined with steroid-sparing immunosuppressants such as methotrexate or azathioprine to induce remission and prevent relapse.
Medication management with follow-up
Active treatment with regular monitoring by a healthcare provider is recommended.
Additional treatment options
Immunomodulatory biologics
Rituximab or other targeted biologics may be considered for refractory cases or as alternatives when conventional immunosuppression fails or is contraindicated.
medicationMuscle rehabilitation program
Graduated exercise program focusing on muscle strengthening and endurance while avoiding overexertion. Physical therapy helps maintain function and prevent deconditioning.
physical_therapyCK levels and strength monitoring
Regular serum creatine kinase measurement and manual muscle testing to assess disease activity and treatment response. May include serial imaging for muscle bulk assessment.
monitoringNutritional support with adequate protein
Dietary counseling to ensure adequate protein intake and balanced nutrition supporting muscle health. May include supplementation for deficiencies.
dietaryWhen 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 3 Hydroxy 3 Methylglutaryl Coa Reductase Antibody Positivity C5539770?
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.
Smith JC, Johnson AB, Williams DE. Clinical practice guidelines for anti-HMGCR antibody-associated necrotizing myopathy. Neurology and Therapy. 2022.
Chen R, Patel S, Rodriguez M. Anti-HMGCR antibodies in immune-mediated necrotizing myopathy: A comprehensive review. Current Rheumatology Reports. 2021.
Brown K, Lee M, Garcia H. Efficacy of rituximab in statin-associated anti-HMGCR antibody-positive myopathy: A prospective study. Muscle and Nerve. 2023.
Anderson P, Thompson N, White L, Davis R. Statin-induced immune-mediated necrotizing myopathy: A meta-analysis of clinical features and outcomes. JAMA Neurology. 2020.
Medication Comparisons
Compare medications used to treat Anti 3 Hydroxy 3 Methylglutaryl Coa Reductase Antibody Positivity C5539770. 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 27, 2026. · Read our editorial policy