Purpose To investigate the relation of Epstein-Barr virus( EBV) infections and malignant lymphoma.Methods EBV-coded RNA( EBER) was detected by in situ hybridization in tumor tissue of 81 cases of malignant lymphoma in oral,maxillofacial and neck regions,with analysis of the clinical pathological features.Results The detection frequencies of EBER was 44.44%.The positive detection of EBER in Hodgkin's lymphomas was 40% and that in non-Hodgkin lymphomas was 45.1%,including 75% in T cell lymphomas,87.5% in NK /...