PTEN and nonpapillary renal cell carcinoma: The results demonstrated that increased mRNA expression levels of PTEN [HR 95% CI = 0.56 (0.41–0.75); P < 0.001] and mTOR [HR 95% CI = 0.54 (0.38–0.78); P < 0.001] were associated with improved OS in patients with ccRCC.