We first performed consensus clustering analysis based on 23 differentially expressed NET-related genes (SELPLG, LILRB2, ITGB2, CSF3R, ITGAM, TLR2, CREB5, TLR7, DYSF, TLR8, MMP9, CYBB, PTAFR, SIGLEC14, FPR1, SLC22A4, DNASE1, MTOR, CYP4F3, F3, SELP, KCNJ15, and G0S2) in ccRCC. This evidence concerns the gene MMP9 and nonpapillary renal cell carcinoma.