title: Development of hepatocellular carcinoma after seroclearance of hepatitis B surface antigen.
abstract: OBJECTIVE
  During the natural course of chronic hepatitis B virus infection, a small proportion of patients experience hepatitis B surface antigen (HBsAg) seroclearance. However, the long-term clinical outcomes of this process are not well established.
  
  
  METHODS
  Thirty-five patients with chronic hepatitis B, followed between 1976 and 2008 at a community liver clinic, experienced HBsAg seroclearance. Ten patients were Caucasian and 25 were Asian. These patients continued to undergo surveillance for hepatocellular carcinoma that included test for alpha-fetoprotein levels and abdominal ultrasound examinations. The median follow-up time was 185 months (range, 27-400 months).
  
  
  RESULTS
  During the initial visit to the clinic, the median age of the patients was 41 years (range, 1.5-72 years). Eighteen patients (51.4%) were hepatitis B e antigen (HBeAg) positive 25 (71.4%) were hepatitis B virus DNA positive, and 13 (37.1%) had cirrhosis. At the time of HBsAg loss, the median age was 54 years (range, 13-77 years) and all were hepatitis B e antigen- as well as hepatitis B virus DNA negative. During the long-term follow-up, 4 patients with cirrhosis developed hepatocellular carcinoma (HCC), which was discovered by ultrasound examination. Factors associated with development of HCC were low baseline levels of albumin (P = .04), family histories of HBsAg positivity (P = .01) and HCC (P = .04), and age of less than 50 years at the time of HBsAg clearance (P = .03).
  
  
  CONCLUSIONS
  HCC can still develop after HBsAg seroclearance. Thus, surveillance should be continued after HBsAg loss in the same manner as for HBsAg positive patients.
authors.affiliation: The Pfleger Liver Institute and the Division of Digestive Diseases, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, California, USA. myrontong@hmri.org
authors.forename: Myron John
authors.initials: MJ
authors.lastname: Tong
authors.forename: Michael Ong
authors.initials: MO
authors.lastname: Nguyen
authors.forename: Lori Terese
authors.initials: LT
authors.lastname: Tong
authors.forename: Lawrence Mitchell
authors.initials: LM
authors.lastname: Blatt
mesh_terms: D000005:Abdomen / Q000000981:diagnostic imaging; D000293:Adolescent; D000328:Adult; D000368:Aged; D006528:Carcinoma, Hepatocellular; D002648:Child; D002675:Child, Preschool; D005260:Female; D005500:Follow-Up Studies; D006514:Hepatitis B Surface Antigens / Q000097:blood*; D019694:Hepatitis B, Chronic / Q000150:complications*; D006801:Humans; D008297:Male; D008875:Middle Aged; D014463:Ultrasonography; D055815:Young Adult; D000509:alpha-Fetoproteins / Q000032:analysis
chemical_list: D006514:Hepatitis B Surface Antigens; D000509:alpha-Fetoproteins