A comparative study on diagnostic value of endoscopic retrograde cholangiopancreatography and MR cholangiopancreatography in malignant biliary obstraction

Objective: Comparing the diagnostic values for the malignant obstruction diseases of biliary tract between endoscopic retrograde cholangiopancreatography (ERCP)and MR cholangiopancreatography (MRCP). Methods: Parallel analysis for the ERCP and MRCP data of 142 malignancies confirmed by surgery and/or ERCP among 383 biliary tract patients was retrospectively carried out. Results: MRCP and ERCP were performed with exploration of 137 cases, showing the total conformity of 96.4%; together with localization conformities of 92.3% and 87.3%, qualitative conformities of 78.5% and 89.8% respectively. Conclusions: In diagnosing the malignant obstructing disease of biliary tract, MRCP has the advantages in convenience, safety and low false negative, but with higher false positive than ERCP; however, if combined with ERCP can get higher positive conformity. (authors)