HEATR9 and nonpapillary renal cell carcinoma: After the following univariate Cox regression analysis, lasso regression analysis and multivariate logistic regression analysis, we ultimately determined 5 critical genes (C17orf66, PAEP, WNT2, IRF4, RUFY4) were significantly associated with the prognosis of ccRCC patients in the training group (Figures 14A, B).