RT Journal Article SR Electronic T1 Deterioration of the liver biochemistry due to reactivation of chronic hepatitis B during etanercept treatment for rheumatoid arthritis JF BMJ Case Reports FD BMJ Publishing Group Ltd SP bcr0920080873 DO 10.1136/bcr.09.2008.0873 VO 2009 A1 Shu-Chen Kuo A1 Hui-Ting Lee A1 Wei-Sheng Chen A1 Chung-Tei Chou A1 Chang-Youh Tsai YR 2009 UL http://casereports.bmj.com/content/2009/bcr.09.2008.0873.abstract AB To report a hepatitis B virus (HBV) reactivation during the treatment of etanercept for rheumatoid arthritis (RA).The chronological course of a patient with RA who developed HBV reactivation associated with etanercept treatment was recorded.A Taiwanese woman with RA was treated by etanercept. A severe deterioration of liver biochemistry occurred soon after the start of the biologicals because of the previously unrecognised HBV carrier status. The condition was successfully alleviated by oral lamivudine administration.In the prevalent area of HBV, viral titre monitoring and pre-emptive antiviral treatment may be fundamentally important to avoid serious complications of HBV reactivation whenever a new treatment modality such as biologicals is started for patients with RA.