PLOD1 and nonpapillary renal cell carcinoma: To investigate the role of PLOD gene family in the tumor immune microenvironment of ccRCC, we systematically analyzed the correlation between PLOD gene expression and immune infiltration using multiple algorithms (CIBERSORT, CIBERSORT-ABS, XCELL, EPIC, MCP-COUNTER, quanTIseq, and TIMER).