Levels of inflammatory markers, such as C-reactive protein (CRP) [7, 12, 13], tumor necrosis factor-α (TNF-α) [14] and monocyte chemoattractant protein1 (MCP-1) [15, 16], may be elevated in the plasma and thrombus tissues of patients with CTEPH, which is in correlation with hemodynamic data. The gene discussed is CCL2; the disease is chronic thromboembolic pulmonary hypertension.