MDK and mesothelioma: The AUCs of serum mesothelin and midkine to distinguish patients with the early-staged mesothelioma from patients with benign asbestos pleurisy were 0.655 (0.490-0.796), with a sensitivity of 42.9% and a specificity of 85%, and 0.557 (0.394-0.712), with a sensitivity of 33.3% and a specificity of 95.0%, respectively.