DNA hypermethylation of certain candidate genes, such as APC (a well characterized tumor suppressor gene), TIMP3 (gene that plays a role in tumor metastasis and invasion), TERT (associated with immortalization), SOCS-3, SOCS-1 (suppressors of cytokine signaling), and p16 (also known as CDK2NA) that play a role in tumor inhibition, occurs frequently in Barrett's esophagus and EAC [71–73]. This evidence concerns the gene CDKN2A and neoplasm.