A retrospective review of 260 patients with biliary obstruction was performed. 10 cases of biliary obstruc-tion caused by enlarged hepatic lymph node group were analyzed focusing mainly on their levels of obstruc-tion and the comparisons of diagnostic accuracies among sonography transhepatic cholangiography (THC)and/or computedd tomography in spite of our limited numbers of cases. Upper hepatic lymph node group was the most common site of obstruction by nodal metastases (7/10) and cystic node was involved in 2 and lower hepatic lymph node group was in 1 patient who had dual sites of obstruction in common hepatic and common bile duct level. In 70 percentage of cases showing biliary dilatation single or multiple hepatic metastatic nodules were found. The accuracy of sonography for precise level was 28.6% and that of CT was 75% and that of direct cholangiography was 100%. In spite fo its low accuracy authors recommend sonography as a initial diagnostic tool in the approach of jaundiced patients who were known to have malignant primary tumors for it is easier to perform and has many well-known advantages, And the accuracuy will be heightened by more concerned evaluation of extrahepatic bile duct.