Epigenetic changes, including DNA methylation, disrupt normal cell function, thus contributing to multiple steps of carcinogenesis. Nasopharyngeal carcinoma (NPC) is endemic in southern China and is highly associated with Epstein-Barr virus (EBV) infection. | Quantitation of DNA methylation in Epstein-Barr virus associated nasopharyngeal carcinoma by bisulfite amplicon sequencing