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Intrahepatic bile duct dilatation shown by computed tomography--predilection for the left lobe?

Dilated biliary duct radicles were most obvious within the left lobe of the liver in 30 out of 42 patients with obstructive jaundice in whom intrahepatic duct dilatation was satisfactorily demonstrated by computed tomography. In 19 of these 30 patients the level of obstruction was at the lower end of the common bile duct. Recognition of this finding may prevent the erroneous diagnosis of intrahepatic or multiple obstructing lesions.