title: Epstein-Barr virus detection in nasopharyngeal tissues of patients with suspected nasopharyngeal carcinoma.
abstract: BACKGROUND
  Nasopharyngeal carcinoma (NPC) is strongly associated with Epstein-Barr virus (EBV). Detection of EBV in biopsy specimens may serve as a tumor marker.
  
  
  METHODS
  To assess the sensitivity and specificity of the polymerase chain reaction (PCR) and in situ hybridization in the diagnosis of NPC, formalin fixed, paraffin embedded nasopharyngeal biopsies from patients in Taiwan suspected of having NPC were studied.
  
  
  RESULTS
  In specimens from 107 patients with NPC, EBV was detected by PCR in 97 cases (90.7%) and by EBER in situ hybridization in 105 cases (98.1%). In specimens from 61 patients without neoplasia, EBV was detected by PCR in 7 cases (11.5%) and by EBER in situ hybridization in 0 cases.
  
  
  CONCLUSIONS
  These results suggest that although EBV DNA may occasionally be detected in nonneoplastic nasopharyngeal tissues, cells expressing EBER are not. EBER in situ hybridization may therefore prove to be a useful adjunct in the diagnosis of NPC.
authors.affiliation: Department of Oncology, Johns Hopkins School of Medicine, Baltimore, Maryland, USA.
authors.forename: S T
authors.initials: ST
authors.lastname: Tsai
authors.forename: Y T
authors.initials: YT
authors.lastname: Jin
authors.forename: R B
authors.initials: RB
authors.lastname: Mann
authors.forename: R F
authors.initials: RF
authors.lastname: Ambinder
mesh_terms: D001706:Biopsy; D002294:Carcinoma, Squamous Cell / Q000473:pathology / Q000821:virology*; D017931:DNA Primers / Q000737:chemistry; D004273:DNA, Neoplasm / Q000032:analysis; D004279:DNA, Viral / Q000032:analysis*; D004854:Herpesvirus 4, Human / Q000235:genetics* / Q000302:isolation & purification; D006801:Humans; D017403:In Situ Hybridization; D009303:Nasopharyngeal Neoplasms / Q000473:pathology / Q000821:virology*; D016133:Polymerase Chain Reaction; D012367:RNA, Viral / Q000032:analysis*; D012189:Retrospective Studies; D012680:Sensitivity and Specificity
chemical_list: D017931:DNA Primers; D004273:DNA, Neoplasm; D004279:DNA, Viral; C099537:Epstein-Barr virus encoded RNA 1; D012367:RNA, Viral