As illustrated in Figure 1B, lymph node metastasis was detected in 31.4% (11/35), 53.2% (25/47), 55.3% (21/38), and 59.3% (16/27) of patients with PSA levels of 0.2-2, 2-5, 5-10, and >10 ng/mL, respectively. This evidence concerns the gene KLK3 and metastatic malignant neoplasm in the lymph nodes.