Survival of patients aged 16 to 34 years at diagnosis analyzed by tumor EBV status. (A) Overall survival (OS) was similar among EBV-positive (n = 53) and EBV-negative (n = 175) patients; P = .21. (B) Disease-specific survival (DSS) was similar, in the same cohort, among EBV-positive and -negative patients; P = .1. Dotted line indicates EBV-negative; solid line, EBV-positive.