TK1 and metastatic malignant neoplasm in the lymph nodes: Data from the TCGA dataset showed that patients with elder age (>60 years; p = 0.003), higher Gleason score (>7; p < 0.005), higher clinical stage (≥T3a; p < 0.005), higher pathological stage (≥T3a; p < 0.001), lymph node metastasis (p < 0.005), shorter OS (p < 0.005), and shorter DFS (p < 0.005) had higher levels of TK1 expression (Table 3).