PRCC and chromophobe renal cell carcinoma: Survival curves stratified by histological subtype are depicted in Figure 1B. Two-year OS rates for the cohort stratified according to subtype were 82% (95% CI 78–84), 60% (95% CI 46–72), and 97% (95% CI 77–99) for ccRCC, pRCC, and chRCC, respectively (p = 0.001).