Hepatic clonorchiasis--a study by endoscopic retrograde cholangiopancreatography.

An endoscopic retrograde cholangiographic study of 31 consecutive cases of hepatic clonorchiasis was performed. Filamentous wavy and/or elliptical appearance of the worm is a pathognomonic finding on ERCP examination. Significant dilation of the second and third generation bile ducts, and dilation and blunting of the terminal branches of the biliary tree are also common findings.