CD4 and nonpapillary renal cell carcinoma: Adopting the TIMER database, the CNV of the identified m5C regulators signatures, including deep deletion, arm-level deletion, diploid/normal, arm-level gain, and high amplification, significantly affected the infiltration levels of B cells, CD4+ T cells, CD8+ T cells, neutrophils, macrophages, and dendritic cells in ccRCC (Figures 4(c)–4(n)).