title: Outcome of patients with positive Epstein-Barr virus serologic status in the absence of nasopharyngeal carcinoma in Hong Kong.
abstract: OBJECTIVE
  To evaluate the current clinical practice of follow-up and the outcomes of patients with raised Epstein-Barr virus (EBV) antibody levels but without pathological evidence of nasopharyngeal carcinoma (NPC) for a possible risk of developing NPC in the future.
  
  
  METHODS
  Retrospective review of prospectively collected database.
  
  
  METHODS
  Tertiary referral otorhinolaryngology center.
  
  
  METHODS
  The study population comprised 66 patients (27 male and 39 female; median age, 43.5 [range, 9-78] years) who presented in 1997 with a positive EBV IgA viral capsid antigen titer but a negative nasopharyngeal biopsy result.
  
  
  METHODS
  The detection of NPC and EBV seroconversion rate.
  
  
  RESULTS
  Of the 66 patients studied, 14 had a positive family history of NPC. Fourteen patients (27%) were excluded because of loss of contact or refusal of follow-up. The median follow-up period of the remaining 52 patients was 54.5 months (range, 12-64 months). Of these 52 patients, 39 (75%) had initial nasendoscopic finding described as completely normal. During the follow-up period, NPC was diagnosed in 1 patient (2%) 18 months after first biopsy. The initial nasendoscopy and histological findings in this patient were normal despite the patient having a raised EBV IgA VCA titer of 1:640. Overall, the EBV serologic status of 36 patients (69%) reverted to normal within the studied period (median interval of 54.5 [range, 12-64] months).
  
  
  CONCLUSIONS
  In the median follow-up period of 54.5 months, only 1 patient (2%) developed NPC. A significant proportion of the patients seroconverted back to normal, none of whom developed NPC.
authors.affiliation: Department of Otorhinolaryngology-Head & Neck Surgery, St George's Hospital Medical School, University of London, London, England, United Kingdom. stephenlo@lycos.co.uk
authors.forename: Stephen
authors.initials: S
authors.lastname: Lo
authors.forename: Wai-Kuen
authors.initials: WK
authors.lastname: Ho
authors.forename: William I
authors.initials: WI
authors.lastname: Wei
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000914:Antibodies, Viral / Q000097:blood*; D002213:Capsid / Q000276:immunology; D002648:Child; D005260:Female; D005500:Follow-Up Studies; D004854:Herpesvirus 4, Human / Q000276:immunology*; D006723:Hong Kong; D006801:Humans; D007070:Immunoglobulin A / Q000097:blood*; D008297:Male; D008875:Middle Aged; D009303:Nasopharyngeal Neoplasms / Q000821:virology*; D009305:Nasopharynx / Q000821:virology*; D012189:Retrospective Studies; D012307:Risk Factors; D012698:Serologic Tests; D016896:Treatment Outcome
chemical_list: D000914:Antibodies, Viral; D007070:Immunoglobulin A