The serum PSA level was substantially reduced at 1 month after PAE; it was 5.2 μg/L (Median, IQR 3.6, 7.4) and 6.6 μg/L (Median, IQR 3.4, 10.2) in the study group and control group, respectively. The gene discussed is KLK3; the disease is pulmonary artery enlargement.