The DNA methylation site results illustrated that CXCL12-related sites, which include cg08979862, cg25721625, cg06048524, cg17267805, cg23407507, cg26267854, and cg00353773, were differentially methylated in the comparison between normal and tumor tissues, while no sites were detected in the IL7R gene region (Figures 5C, D and Table S9). The gene discussed is CXCL12; the disease is neoplasm.