CCL21 and neoplasm: Of note, correlation and DNA methylation analyses were conducted on the top 12 DEGs SLC (6 up- and 6 downregulated retrieved from differential analysis between each TCGA tumor type and pooled GTEx control group), 4 SLCs strictly related to OS and PFI, 4 SLCs implicated in tumoral immune response, and 6 SLCs mainly associated to drug sensitivity (Table 2).