title: [Comparative study between magnetic resonance cholangiopancreatography and endoscopic retrograde cholangiopancreatography in the diagnosis of the pancreatic and biliary obstruction].
abstract: BACKGROUND
  The endoscopic retrograde cholangiopancreatography and magnetic resonance cholangiopancreatography were methods used for diagnosis of the diseases in the biliary and pancreatic ducts.
  
  
  OBJECTIVE
  Compare the diagnostic concordance among, analyzing sensitivity, specificity, positive predictive value, negative predictive value and accuracy.
  
  
  METHODS
  There were 41 patients in the studied group, divided in two groups: I--without biliary or pancreatic tract obstruction, and II--with obstruction. Group II was further divided in A--obstruction due to lithiasis, and B--due to other causes.
  
  
  RESULTS
  Concordance between the two methods was found in 67% in group I and 82% in group II. Sensitivity of endoscopic retrograde cholangiopancreatography was 94% and magnetic resonance cholangiopancreatography was 89%. Specificity of endoscopic retrograde cholangiopancreatography was 100% and magnetic resonance cholangiopancreatography was 67%. Magnetic resonance cholangiopancreatography positive predictive value was 93%, the negative predictive value was 50% and the accuracy was 85%.
  
  
  CONCLUSIONS
  Both methods showed the same sensitivity.
authors.affiliation: Departamento de Cirurgia da Universidade Federal do Paraná-UFPR, no Instituto de Gastroenterologia do Paraná e no Centro de Tomografia Computadorizada de Curitiba, Curitiba, PR.
authors.forename: J C
authors.initials: JC
authors.lastname: Pisani
authors.forename: A
authors.initials: A
authors.lastname: Bacelar
authors.forename: O
authors.initials: O
authors.lastname: Malafaia
authors.forename: J M
authors.initials: JM
authors.lastname: Ribas-Filho
authors.forename: N G
authors.initials: NG
authors.lastname: Czezcko
authors.forename: P A
authors.initials: PA
authors.lastname: Nassif
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002758:Cholangiography / Q000379:methods*; D002760:Cholangiopancreatography, Endoscopic Retrograde / Q000379:methods; D002779:Cholestasis / Q000175:diagnosis*; D003251:Constriction, Pathologic / Q000175:diagnosis; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008297:Male; D008875:Middle Aged; D010182:Pancreatic Diseases / Q000175:diagnosis*; D010183:Pancreatic Ducts / Q000000981:diagnostic imaging* / Q000473:pathology; D011237:Predictive Value of Tests; D012680:Sensitivity and Specificity
vernacular_title: Estudo comparativo entre a colangiopancreatografia por ressonância magnética e a colangiopancreatografia endoscópica no diagnóstico das obstruções biliopancreáticas.