Lupus

Deep-Dive Articles

The articles below expand this overview into serology, diagnosis, organ-specific involvement, modern biologics, pregnancy planning, and the Sjögren's overlap. Written for patients, with real research citations.

ANA, dsDNA & Lupus Autoantibodies

ANA titer/pattern, anti-dsDNA, Smith, Ro/La, ribosomal P, and how antibodies predict organ involvement.

ACR/EULAR 2019 Criteria

The current classification system — ANA entry criterion, weighted domains, clinical + immunologic scoring.

Lupus Nephritis

ISN/RPS classes I–VI, when to biopsy, induction with MMF or cyclophosphamide, belimumab add-on, voclosporin.

Neuropsychiatric Lupus

Cognitive dysfunction, headache, mood, stroke, seizures — separating primary NPSLE from steroid/drug effects.

Hydroxychloroquine & Antimalarials

Why HCQ is the backbone of lupus care, dosing by weight, retinal toxicity screening, level monitoring.

Biologics for Lupus

Belimumab (BLyS), anifrolumab (type I IFN), and off-label rituximab — mechanism, trials, sequencing.

Lupus & Pregnancy

Preconception remission, anti-Ro/La and congenital heart block, antiphospholipid overlap, medication safety.

Cutaneous Lupus

Acute, subacute, and chronic/discoid forms, photoprotection, topical therapy, and when skin lupus goes systemic.

Lupus & Sjögren's Overlap

Secondary Sjögren's in SLE, shared Ro/La antibodies, sicca symptoms, dental and ocular care.

What is Lupus?

Lupus is a chronic autoimmune disease where the immune system mistakenly attacks healthy tissues and organs. This can cause widespread inflammation and damage to various body systems, including the joints, skin, kidneys, heart, lungs, blood vessels, and brain.

Types of Lupus

1. Systemic Lupus Erythematosus (SLE)

Most common type of lupus.
Affects multiple organ systems and can range from mild to severe.

2. Cutaneous Lupus

Affects the skin and can cause rashes or lesions.
Subtypes: Discoid lupus (chronic skin rashes), subacute cutaneous lupus (red, scaly patches).

3. Drug-Induced Lupus

Caused by certain medications and usually resolves once the medication is stopped.
Symptoms: Similar to those of SLE but typically less severe.

4. Neonatal Lupus

Rare condition affecting infants born to mothers with certain autoimmune antibodies.
Symptoms: Skin rash, liver problems, and in rare cases, congenital heart block.

Common Symptoms of Lupus

Symptoms can vary widely among individuals and may include:

Fatigue
Joint pain, stiffness, and swelling
Butterfly-shaped facial rash across the cheeks and nose
Skin rashes and lesions that worsen with sun exposure (photosensitivity)
Fever
Hair loss
Raynaud's phenomenon: Fingers and toes turning white or blue in response to cold or stress
Chest pain when taking deep breaths
Headaches and cognitive difficulties

Causes and Risk Factors

Genetic predisposition: Family history of lupus or other autoimmune diseases can increase the risk.
Environmental triggers: Such as infections, sunlight, and certain medications.
Hormonal factors: More common in women, particularly those aged 15-45, suggesting a link to estrogen.
Ethnicity: More prevalent in people of African American, Hispanic, Asian, and Native American descent.

Diagnosis

Medical history and physical examination: To evaluate symptoms and potential risk factors.
Blood tests:
- Antinuclear antibody (ANA) test: Common initial test for detecting autoimmune activity.
- Other antibody tests: Such as anti-dsDNA and anti-Smith antibodies, which are more specific to lupus.
Imaging tests: Such as X-rays or echocardiograms to detect organ involvement.
Urinalysis: To check for kidney involvement by detecting proteins or red blood cells in urine.
Skin or kidney biopsy: May be performed to confirm a diagnosis and determine the extent of the disease.

Treatment Options

Medications:
- Nonsteroidal anti-inflammatory drugs (NSAIDs): For joint pain and inflammation.
- Antimalarial drugs: Such as hydroxychloroquine to help control lupus symptoms.
- Corticosteroids: To reduce inflammation and manage severe symptoms.
- Immunosuppressive drugs: Such as azathioprine and methotrexate to control immune system activity.
- Biologic agents: Such as belimumab for more targeted treatment.
Lifestyle changes:
- Sun protection: Use sunscreen and wear protective clothing to reduce photosensitivity.
- Balanced diet: Emphasize nutrient-rich foods to support overall health.
- Regular exercise: Helps improve cardiovascular health and reduce joint stiffness.
- Stress management: Techniques like yoga and meditation to manage stress, which can trigger flares.

Prevention and Management Strategies

Avoid known triggers: Such as excessive sun exposure and certain medications.
Follow treatment plans: Adhere to prescribed medication regimens and attend regular medical check-ups.
Monitor symptoms: Keep track of symptoms and report any new or worsening signs to a healthcare provider.

Complications of Lupus

Kidney damage (lupus nephritis): Can lead to kidney failure if not managed effectively.
Heart and blood vessel issues: Increased risk of cardiovascular disease and inflammation of the heart (pericarditis).
Lung involvement: Including pleuritis and potential lung damage.
Blood disorders: Such as anemia, leukopenia, and thrombocytopenia.
Nervous system problems: Seizures, headaches, and cognitive dysfunction.
Infections: Due to weakened immune system function.