epstein-barr virus ( ebv ) specific antibody titers , anticomplement immunofluorescence staining of tumors for the presence of the epstein-barr nuclear antigen ( ebna ) , and ebv complementary ribonucleic acid ( crna ) /deoxyribonucleic acid ( dna ) hybridization and vdna/dna reassociation analysis implicate ebv as the probable etiologic agent in these disorders .
C0027651
tumors
C0012634
disorders