CT Diagnosis of intrahepatic cholangiocarcinoma

Objective To explore the CT features of intrahepatic cholangiocarcinoma. Methods CT findings of 16 cases of intrahepatic cholangiocarcinoma proved pathologically were analyzed retrospectively. Results Of all the 16 cases, 12 were single mass with a diameter of 5～10 cm at the central level and 4 with multiple lesions of low density. Dilation of intrahepatic biliary duct with peripheral liver hypodensity were found in 8 cases. 5 of which had hepatolith. Atrophy of liver lobe was found in 6 patients, retraction of liver capsule adjacent to the tumor in 6. Of the 10 undergoing contrast enhancement, 3 were found linear enhancement, 2 reticular enhancement and 5 nodular enhancement in the foci, 9 enhancement at the periphery of the mass. There were few enhancements in the large hypodensity area. During the three phase contrast scanning, 8 showed little change in the enhancement, 1 fast in fast out and 1 delayed enhancement. Conclusion CT findings of intrahepatic cholangiocarcinoma are specific to some degree. But when there is marked stone in the biliary duct, or something of the liver has been resected, it need to pay more attention to the CT signs.