Systemic Lupus Erythematosus Clinical Manifestations

Introduction to SLE

• Systemic lupus erythematosus is a multisystem autoimmune disease that most commonly presents with constitutional symptoms, mucocutaneous manifestations, musculoskeletal complaints, and can progress to involve renal, neurologic, hematologic, cardiovascular, and pulmonary systems, predominantly affecting women of reproductive age 1, 2, 3

Mucocutaneous Manifestations

• Discoid lesions correlate with long-term prognosis 4
• Photosensitivity is present in many patients 4

Musculoskeletal Symptoms

• Arthritis is a frequent presenting symptom and provides prognostic information 4, 3

Renal Manifestations

• Renal disease relapses occur in up to 45% of patients 3
• Hypertension is common, especially with renal involvement 3

Neuropsychiatric Manifestations

• Seizures are significant manifestations that correlate with outcome 4, 3
• Psychosis is a serious neuropsychiatric manifestation 4, 3

Hematologic Abnormalities

• Thrombocytopenia indicates renal disease and worse prognosis 4, 3

Cardiovascular Manifestations

• Serositis correlates with outcome 4
• Increased risk of atherosclerosis and cardiovascular disease is a major concern 3

Pulmonary Manifestations

• Pleural involvement is the most common pulmonary manifestation 1, 2, 5
• Interstitial lung disease occurs in 1% to 15% of patients, though less severe than in other connective tissue diseases 1, 2, 5

Laboratory and Immunologic Findings

• Anti-double-stranded DNA antibodies are relatively specific for SLE 6
• Low complement levels often correlate with disease activity 4, 3
• Antiphospholipid antibodies indicate increased risk for thrombosis and pregnancy complications 3
• Anti-Ro/SSA and anti-La/SSB antibodies provide prognostic information 4
• Anti-U1-RNP antibodies are associated with ILD risk 1, 2, 5

Additional Clinical Features

• Raynaud phenomenon is associated with ILD development 1, 2
• Abnormal nail-fold capillaries are risk factors for ILD 1, 2

Important Clinical Pitfalls

• Symptoms may worsen during pregnancy, particularly in patients with lupus nephritis and antiphospholipid antibodies, requiring heightened vigilance 3
• Pulmonary manifestations follow a chronic course associated with significantly worse prognosis and higher mortality 1, 2, 5, 7