KLK3 and neoplasm: mPITX3 levels as a continuous variable were related to prognostic clinicopathological variables and were found to be significantly correlated with the ISUP Gleason grading group (ρ = 0.112; p = 0.012), pathologic tumor (pT) category (ρ = 0.123; p = 0.006), presurgical PSA (ρ = 0.134; p = 0.003), and the AR activity score (ρ = 0.154; p = 0.005) as obtained from TCGA [27] in the training cohort.