KLK3 and pulmonary artery enlargement: All 39 patients showed significant improvement ofLUTS after PAE, the mean changes being as follows: a reduction of 18.9 ± 7.1 in the IPSS,a reduction of 3.4 ± 1.5 in the QoL score, an increase of 8.8 ± 5.9 mL/s in theQmax, a reduction of 31.8 ± 24.0 cm3 in P V, a reduction of 2.5 ± 3.9ng/mL in the PSA level, and a reduction of 119.1 ± 197.3 mL in the PVR volume(p < 0.01 for all).