A 32-year-old woman from Mumbai with a 3-year history of SLE (ANA positive, anti-dsDNA positive, anti-Smith positive) on hydroxychloroquine and prednisolone 10 mg/day presents with acute onset dyspnea, pleuritic chest pain, and a pericardial friction rub on auscultation. Chest X-ray shows a small left pleural effusion. Echocardiography reveals a small pericardial effusion without tamponade. ESR is 92 mm/hr, CRP 8.2 mg/dL, and complement levels are low (C3 45 mg/dL, C4 10 mg/dL). What is the most appropriate management?

## Clinical Diagnosis: Lupus Pericarditis **Key Point:** This patient has SLE with acute pericarditis and pleuritis (serositis), evidenced by: - Pericardial friction rub - Pleuritic chest pain with pleural effusion - Pericardial effusion on echo (without tamponade) - Active serology (low complement, elevated ESR/CRP) - Known SLE with positive serology ## Serositis in SLE: Classification & Management | Feature | Pericarditis | Pleuritis | Tamponade | |---------|--------------|-----------|----------| | Presentation | Chest pain, friction rub | Pleuritic pain, effusion | Dyspnea, hypotension, JVD | | Imaging | Pericardial effusion | Pleural effusion | Large effusion, RA/RV collapse | | Management (uncomplicated) | NSAIDs + prednisolone | NSAIDs + prednisolone | Pericardiocentesis + prednisolone | | Prednisolone dose | 0.5–1 mg/kg/day | 0.5–1 mg/kg/day | 1 mg/kg/day + immunosuppression | **Clinical Pearl:** Lupus pericarditis is usually self-limited and responds well to NSAIDs and moderate-dose prednisolone. Pericardiocentesis is indicated ONLY if: 1. Hemodynamic tamponade is present (this patient has NO tamponade) 2. Effusion is large and refractory to medical therapy 3. Diagnostic uncertainty exists (to rule out infection, malignancy) This patient has a **small effusion without tamponade** — medical management is appropriate. **High-Yield:** NSAIDs (indomethacin 50 mg TDS) combined with prednisolone 0.5–1 mg/kg/day is the standard first-line therapy for uncomplicated lupus serositis. Colchicine is NOT standard for SLE pericarditis (it is used for acute pericarditis of other etiologies, e.g., post-MI, idiopathic). Cyclophosphamide is reserved for severe, refractory serositis or concurrent major organ involvement (e.g., lupus nephritis, CNS disease). **Mnemonic:** SEROSITIS STEP-UP — **S**mall effusion → NSAIDs + steroids, **E**xamine for tamponade, **R**efractory → add immunosuppression, **O**bserve with echo, **S**evere → pericardiocentesis, **I**ncrease prednisolone dose, **T**ap only if hemodynamic compromise, **I**ntensify therapy if needed, **S**upport with colchicine (post-acute phase). ## Why This Answer The patient has uncomplicated lupus pericarditis (small effusion, no tamponade). Prednisolone 0.5–1 mg/kg/day plus indomethacin is the standard induction regimen. NSAIDs reduce inflammation and pain; prednisolone suppresses the underlying autoimmune process. Weekly echo monitoring ensures the effusion is resolving and detects any progression to tamponade. Pericardiocentesis is unnecessary without hemodynamic compromise. [cite:Harrison 21e Ch 280; Robbins 10e Ch 6]