LCN2 and pulmonary arterial hypertension: <h4>Introduction</h4>This study aimed to evaluate the diagnostic value of lipocalin 2 (LCN2) and microRNA-8078 (miR-8078) in congenital heart disease-associated pulmonary arterial hypertension (CHD-PAH).<h4>Methods</h4>Seventy-six patients were diagnosed with CHD-PAH according to established clinical guidelines (including mean pulmonary arterial pressure (mPAP), pulmonary artery wedge pressure, and pulmonary vascular resistance) via right heart catheterization.