title: Is routine MR cholangiopancreatography (MRCP) justified prior to cholecystectomy?
abstract: OBJECTIVE
  We investigated routinely the bile ducts by magnetic resonance cholangiopancreaticography (MRCP) prior to cholecystectomy. The aim of this study was to analyze the rate of clinically inapparent common bile duct (CBD) stones, the predictive value of elevated liver enzymes for CBD stones, and the influence of the radiological results on the perioperative management.
  
  
  METHODS
  In this prospective study, 465 patients were cholecystectomized within 18 months, mainly laparoscopically. Preoperative MRCP was performed in 454 patients.
  
  
  RESULTS
  With MRCP screening, clinically silent CBD stones were found in 4%. Elevated liver enzymes have only a poor predictive value for the presence of CBD stones (positive predictive value, 21%; negative predictive value, 96%). Compared to the recent literature, the postoperative morbidity in this study was low (0 bile duct injury, 0.4% residual gallstones).
  
  
  CONCLUSIONS
  Although MRCP is diagnostically useful in the perioperative management in some cases, its routine use in the DRG-era may not be justified due to the costs.
authors.affiliation: Department of Surgery, St. Claraspital, Basel, Switzerland.
authors.forename: C A
authors.initials: CA
authors.lastname: Nebiker
authors.forename: S A
authors.initials: SA
authors.lastname: Baierlein
authors.forename: S
authors.initials: S
authors.lastname: Beck
authors.forename: M
authors.initials: M
authors.lastname: von Flüe
authors.forename: C
authors.initials: C
authors.lastname: Ackermann
authors.forename: R
authors.initials: R
authors.lastname: Peterli
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D049448:Cholangiopancreatography, Magnetic Resonance; D017081:Cholecystectomy, Laparoscopic; D042883:Choledocholithiasis / Q000175:diagnosis* / Q000378:metabolism / Q000601:surgery*; D015331:Cohort Studies; D003955:Diagnostic Tests, Routine; D005260:Female; D042882:Gallstones / Q000175:diagnosis* / Q000378:metabolism / Q000601:surgery*; D006801:Humans; D008297:Male; D008875:Middle Aged; D020380:Needs Assessment; D011237:Predictive Value of Tests; D012189:Retrospective Studies; D000637:Transaminases / Q000097:blood; D016896:Treatment Outcome; D055815:Young Adult
chemical_list: D000637:Transaminases