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The ability to preoperatively diagnose the nature and extent of biliary tract disease has been significantly advanced with the advent of endoscopic retrograde cholangiography.
When supplemented with the appropriate use of percutaneous transhepatic cholangiography, many lesions of the biliary tract which heretofore were undiagnosed preoperatively can now be clearly defined.
The establishment of a diagnosis and related prognosis, as well as the providing of visual data upon which to plan a surgical approach are all benefits which attend these new diagnostic techniques.
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