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Abstract
Percutaneous transhepatic cholangiography is useful in properly selected patients. It visualizes the location and extent of the pathologic process in patients with obstructive jaundice and permits decompression of the liver for improved function and easier surgery. Occasionally, it reveals a normal biliary tree, which indicates intrahepatic cholestasis rather than mechanical biliary obstruction and obviates surgery. The procedure is not without hazards, which must be evaluated in the light of the information it yields.