Systemic Lupus Erythematosus Related To C1qa Cn380041
A systemic autoimmune condition linked to deficiency of complement protein C1q. Causes inflammation affecting multiple organs. Treatment involves immunosuppressants and anti-inflammatory medications.
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.
Warning signs - seek immediate care
Lupus nephritis
Seizures
Generalized symptoms
(immunologic)Significant symptoms that substantially affect daily functioning.
Frequency: Common at all stages
Fatigue
(constitutional)Arthritis
(musculoskeletal)Malar rash
(dermatologic)Anemia
(hematologic)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
Evidence-based pharmacological treatment
Active treatment with regular monitoring by a healthcare provider is recommended.
Strict photoprotection and sun avoidance
Comprehensive sun protection including broad-spectrum sunscreen, protective clothing, and avoiding peak sun exposure to prevent disease flares triggered by UV exposure.
Antimalarial immunomodulatory therapy
Hydroxychloroquine or chloroquine as first-line disease-modifying therapy to control autoimmune activity, reduce flares, and protect organ systems.
Additional treatment options
Immunosuppressive therapy
Corticosteroids for acute flares and steroid-sparing immunosuppressants such as azathioprine, mycophenolate, or methotrexate for long-term disease control.
medicationRegular disease activity and organ assessment
Frequent laboratory monitoring including complement levels, autoantibodies, and organ-specific assessments to detect and prevent organ damage.
monitoringAnti-inflammatory and bone-protective nutrition
Dietary modifications emphasizing anti-inflammatory foods, adequate calcium and vitamin D supplementation, and sodium restriction to support overall health.
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 Systemic Lupus Erythematosus Related To C1qa Cn380041?
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.
Petri M, Orbai AM, Alarcón GS, et al. Derivation and validation of the Systemic Lupus International Collaborating Clinics classification criteria for systemic lupus erythematosus. Arthritis Rheum. 2012.
Birmingham DJ, Hebert LA. The complement system in systemic lupus erythematosus. Curr Rheumatol Rep. 2015.
Lintner KE, Wu YL, Yang Y, et al. Early-Onset Autoimmunity Associated with C1q Deficiency. J Immunol. 2016.
Tselios K, Koumaras C, Gladman DD, Urowitz MB. Systemic Lupus Erythematosus and Renal Involvement: A Meta-Analysis of Treatment Outcomes. Lupus. 2019.
Medication Comparisons
Compare medications used to treat Systemic Lupus Erythematosus Related To C1qa Cn380041. 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