Spiral CT Diagnosis of Intrahepatic Cholangiocarcinoma and Correlation with Pathological Findings (Report of 20 Cases )

Ojectives:To evaluate diagnostic value of contrast-enhanced helical CT in intrahepatic cholangi ocarcinoma and correlating the CT features with pathologic findings.Methods:Pre-and post-contrast CT scanning of upper abdomen were performed in 20 cases with intrahepatic cholangiocarcinoma.arterial phase 20s and the portal venous phase 60s.14 of 20 cases underwent additional delayed scans began at 4~15min.CT and pathological findings were analyzed.Results:According to the pathological types,mass-type was found in 16 case,infiltrative-type in 2 cases,and intracavitary-type in 2 cases.No contrast enhancement (6 cases) or mild or moderate rim-like enhancement (14 cases) were the most frequent enhancement patterns observed in early stage.on the delay scan imaging,the center of the tumors showed mottling,reticular,or homogeneous enhancement.moreover,ancillary findings including the intrahepatic biliary ducts,hepatic lobar atrophy,The abnomal enhancement areas peripheral to the tumor were also seen in helical CT.Conclusion:The typical CT appearances of intrahepatic cholangiolarcinoma include:hypodensity of hepatic lesion on precontrast scan,peripheral enhancement in the early stage,and central delay enhancement.