The Cox regression models for PFS and OS were fitted to the subgroup of Clear Cell RCCa (n = 91), confirming PRAT in tumour side as an independent prognosticator of OS (HR = 0.2, 95CI = 0.04–0.6, P = 0.010), and PRAT in contralateral side as an independent predictor of PFS (HR = 0.4, 95CI = 0.1–0.9, P = 0.028). This evidence concerns the gene PPAT and neoplasm.