Moreover, amongst the patients with benign tumours who were dead, 5 patients had PSA <10, 9 patients had PSA 10–49, and only 2 patients had PSA >50 (4.88 ± 3.35, 22.41 ± 12.3, 102.7 ± 54.16), respectively. The gene discussed is KLK3; the disease is benign neoplasm.