BIRC5 and nonpapillary renal cell carcinoma: For histopathological subtype, high survivin expression was correlated with poor OS (HR, 7.37; 95% CI: 2.21–24.58; p = 0.001), CSS (HR, 2.36; 95% CI: 1.41–3.95; p = 0.001), and PFS (HR, 2.14; 95% CI: 1.51–3.04; p < 0.001) for ccRCC.