In recent years, percutaneous transhepatic cholangiography (PTC) using fine needle has become widely employed as the procedure of choice for direct opacification of the biliary trees because of its high success rate, easy performance and relative low complication rate. Authors present the clinical and PTC findings of experienced cases during last four years, from May 1976 to June 1980 , at the Department of Radiologcy, Korea University Hospital. We tried to study of PTC in 44 cases, 32 males and 12 females m and succeeded in visualization of bile ducts in 41 cases, but the other three cases were failed to visualize the bile ducts. Final confirmative diagnosis was achieved in 29 cases by operation, laparoscopy and other clinical methods. The PTC diagnoiss was correct in 24 of 29 cases , and the others were incorrect. The 29 final diagnosis was including 13 cases of biliary stones. 6 cases of biliary cancer, 3 cases of pancreatic cancer, 3 cases of clonorchiasis, one cases of C D ascariasis and 3 cases of others. Incorrect PTC diagnosis was made in five cases. They were one case of nonvisulaized intrahepatic stones, one case of hepatoma PTC diagnosed as cholangiocarcinoma, one case of pancreatic cancer diagnosed as cholangiocarcinoma, one case of clonorchiasis diagnosed as biliary stones and one case of normal CBD which was diagnosed as distal CBD cancer. And we experienced one case of bile peritonitis as complications, who was 35 year-old female patient with multiple CBD stones, and aspirated about 500mo of bile stained ascites during operation.