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Summary
Systemic lupus erythematosus (SLE) diagnosis can be challenging. Some patients initially show negative serology, but serial testing may reveal positive markers over time, aiding diagnosis.
Area of Science:
- Rheumatology
- Immunology
- Internal Medicine
Background:
- Diagnosis of Systemic Lupus Erythematosus (SLE) typically relies on specific serological markers.
- Positive antinuclear antibody (ANA), LE cell tests, and anti-double-stranded DNA (anti-DNA) antibodies are often required for diagnosing active SLE.
Observation:
- This report details five patients with SLE who presented with active multisystemic disease but initially negative serological markers.
- These patients were monitored for periods ranging from 10 months to 7 years.
Findings:
- Initially negative serological markers, including ANA, LE cell tests, and anti-DNA antibodies, converted to positive over time in these SLE patients.
- This seroconversion mirrors the phenomenon observed in some patients with rheumatoid arthritis.
Implications:
- Negative serological tests do not always exclude the possibility of SLE.
- Serial serological testing at intervals may be necessary for accurate diagnosis in suspected SLE cases.
- Understanding seroconversion is crucial for diagnosing SLE, particularly in seronegative presentations.