Estudo comparativo entre a colangiopancreatografia por ressonância magnética e a colangiopancreatografia endoscópica no diagnóstico das obstruções biliopancreáticas

Abstract

Background - The endoscopic retrograde cholangiopancreatography and magnetic resonance cholangiopancreatography were methods used for diagnosis of the diseases in the biliary and pancreatic ducts. Aim - Compare the diagnostic concordance among, analyzing sensitivity, specificity, positive predictive value, negative predictive value and accuracy. Patients/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%. Conclusion - Both methods showed the same sensitivity.