TNFRSF8 and diffuse large B-cell lymphoma: The clonal relationship between EBV-positive cHL and DLBCL is corroborated by shared EBV positivity, overlapping immunophenotypic markers (CD30 and EBER), and similar histopathological features. This case uniquely illustrates the transition from EBV-positive cHL to DLBCL in the lung, emphasizing the potential for EBV to influence the clonal evolution of lymphocytes.