A female university student in her early s is evaluated in the rheumatology clinic for a -week history of profound fatigue and stiffness in her proximal interphalangeal joints. She notes that the skin across her cheeks becomes persistently red and painful after brief sun exposure. Over the past days, she has developed noticeable bilateral ankle swelling. Her blood pressure is mmHg. Laboratory evaluation shows a serum creatinine of mg/dL, and urinalysis demonstrates proteinuria with red blood cell casts. Arrange the following clinical interventions in the standard chronological sequence for the definitive diagnostic workup and targeted management of this patient's underlying condition.
- 1Perform initial serologic screening with an antinuclear antibody (ANA) assay
- 2Obtain confirmatory serology including anti-dsDNA antibodies and complement levels
- 3Perform a percutaneous renal biopsy for histologic classification
- 4Initiate targeted induction immunosuppressive therapy (e.g., mycophenolate mofetil)
Cevap
The correct chronological sequence is: 1) ANA screening, 2) Confirmatory anti-dsDNA/complement testing, 3) Percutaneous renal biopsy, 4) Targeted induction immunosuppressive therapy.
The evaluation of suspected Systemic Lupus Erythematosus (SLE) follows a strict sequence beginning with highly sensitive screening (ANA). If this is positive, highly specific markers (anti-dsDNA, anti-Smith) are evaluated to confirm the diagnosis. Because this patient exhibits clear signs of renal involvement (edema, proteinuria, RBC casts, elevated creatinine), a renal biopsy is the absolute critical next step to classify the lupus nephritis. Only after the histologic class is definitively established can the appropriate, targeted induction immunosuppressive therapy be safely initiated.
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Anahtar Kavram
Sequential evaluation and management of suspected Systemic Lupus Erythematosus and lupus nephritis
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