TP53 and nonpapillary renal cell carcinoma: Co-expressed genes were also mapped to the following KEGG pathways involved in tumorigenesis of ccRCC including cell cycle, ribosome, p53 signaling pathway, proteasome, pyrimidine metabolism, cellular senescence, homologous recombination, DNA replication, drug metabolism, base excision repair, mismatch repair, and cytosolic DNA-sensing pathway.