title: Comparison of EUS and ERCP in the investigation with suspected biliary obstruction caused by choledocholithiasis: a randomized study.
abstract: BACKGROUND
  EUS may be used to reduce the need of diagnostic ERCP.
  
  
  OBJECTIVE
  Our purpose was to investigate the benefits and safety of an EUS-guided versus an ERCP-guided approach in the management of suspected biliary obstructive diseases caused by choledocholithiasis, in whom a US study is not diagnostic.
  
  
  METHODS
  A randomized study.
  
  
  METHODS
  A university medical unit.
  
  
  METHODS
  Patients with clinical, biochemical, or radiologic suspicion of biliary obstruction.
  
  
  METHODS
  In the EUS group, therapeutic ERCP was performed at the same EUS session if a lesion was found. In the ERCP group, therapeutic treatment was carried out at the discretion of the endoscopist.
  
  
  METHODS
  The number of ERCPs avoided, procedure-related complications, and recurrent biliary symptoms on follow-up at 1 year.
  
  
  RESULTS
  Thirty-three patients were randomized to EUS and 32 to ERCP. Three patients (9.4%) had failed ERCPs, whereas all EUS procedures were successful. Nine (27.3%) patients in the EUS group were found to have biliary lesions that were all treated by ERCP. In the ERCP group, 7 (22%) patients had biliary lesions detected that were treated in the same session. More patients had serious complications (bleeding, acute pancreatitis, and umbilical abscess) in the ERCP group. One patient in each group had recurrent biliary symptoms during follow-up. With EUS used as a triage tool, diagnostic ERCP and its related complications could be spared in 49 (75.4%) patients.
  
  
  CONCLUSIONS
  In patients suspected to have biliary obstructive disease, EUS is a safe and accurate test to select patients for therapeutic ERCP.
authors.affiliation: Institute of Digestive Disease, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong SAR, China.
authors.forename: Yuk Tong
authors.initials: YT
authors.lastname: Lee
authors.forename: Francis K L
authors.initials: FK
authors.lastname: Chan
authors.forename: W K
authors.initials: WK
authors.lastname: Leung
authors.forename: Henry L Y
authors.initials: HL
authors.lastname: Chan
authors.forename: Justin C Y
authors.initials: JC
authors.lastname: Wu
authors.forename: Man Yee
authors.initials: MY
authors.lastname: Yung
authors.forename: Enders K W
authors.initials: EK
authors.lastname: Ng
authors.forename: James Y W
authors.initials: JY
authors.lastname: Lau
authors.forename: Joseph J Y
authors.initials: JJ
authors.lastname: Sung
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002760:Cholangiopancreatography, Endoscopic Retrograde / Q000379:methods*; D042883:Choledocholithiasis / Q000150:complications* / Q000175:diagnosis; D001651:Cholestasis, Extrahepatic / Q000175:diagnosis / Q000209:etiology*; D003135:Common Bile Duct; D003937:Diagnosis, Differential; D019160:Endosonography / Q000379:methods*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D015203:Reproducibility of Results; D012189:Retrospective Studies