An accurate preoperative diagnosis of biliary tract disease is essential for proper therapy of the patient with jaundice or unusual abdominal pain. Our analysis of fifty-five complex cases suggests that careful selection of preoperative diagnostic tests will allow an accurate preoperative diagnosis to be made. In patients with mild obstructive jaundice without obvious stones or carcinoma, retrograde cholangiography, physicochemical and cytologic analysis of bile, and arteriography should be performed. These studies should provide data that will make operation unnecessary or clearly indicated. In patients with severe obstructive jaundice, percutaneous transhepatic cholangiography is indicated. This technic can establish the presence and nature of a high ductal obstruction, can be converted for long-term therapeutic decompression, and will allow bile to be obtained for cytologic study and tissue to be obtained, by brush biopsy, for histologic examination. In patients in whom pain is the outstanding symptom, arteriography and retrograde cholangiography will most likely establish the diagnosis.
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