The LASSO logistics regression and SVM-RFE algorithms (Figures 4(a), 4(b), and 4(c)) revealed that 19 rejection-related genes involved in ccRCC occurrence, including RAC2, PLA1A, NLRC5, LAPTM5, TYROBP, TAP1, CCL8, IRF1, GBP2, PSMB9, FCN1, GBP1, GPR171, ITK, PLAC8, CCL5, ADAMDEC1, IDO1, and CXCL9 (Figures 4(d) and 4(e)). Here, CCL8 is linked to nonpapillary renal cell carcinoma.