Chest X-ray revealed pleurisy with pleural effusion, an increased level of C-reactive protein (CRP) (161 mg/L, normal: 0–5 mg/L), and an erythrocyte sedimentation rate of 40 mm/h (normal: 0–10 mm/h); blood tests showed the presence of lupus anticoagulant and ANA. Here, CRP is linked to Pleural effusion.