RASSF1A, p14ARF, and MGMT [34–38]; CHRNA3, DOK1, and GNMT [39]; p16, hMLH1, MINT1, MINT2, MINT12, MINT25, and MINT31 [40]; APC, CDH1, MHL1, CDKN2A, CDKN2B, and RUNX3 [17]; CDH1 [41]; DKK3 [42]; PTEN [43]; MGMT[44]; TFPI2 [22]; CACNA2D3 [45]; PCDH10 [46]; SOX2 [47]; MAL [48]; and COX2 [49] were previously reported to be hypermethylated in gastric cancer. The gene discussed is DKK3; the disease is gastric cancer.