Prognostic potential of liquid biopsy tracking in the posttreatment surveillance of patients with nonmetastatic nasopharyngeal carcinoma

Background The current study was performed to investigate whether circulating cell‐free Epstein‐Barr virus DNA (cfEBV DNA) would be useful for posttreatment surveillance in patients with nasopharyngeal carcinoma (NPC). Methods The authors identified a total of 1984 nondisseminated NPC patients from an institutional big‐data research platform. Blood samples were collected within 3 months of the completion of radiotherapy and every 3 to 12 months...