Abstract: Objective The aim of this study was to summarize the conventional and contrast-enhanced ultrasonography (CEUS)manifestations of intrahepatic cholangiocarcinoma (ICC).Methods 52 patients with ICC were recruited in our hospital, and all underwent conventional and CEUS check-up.Results The gray-scale ultrasonography showed than the tumors presented with uniform hypoechoic in 23 cases (44.2%, uneven hypoechoic in 22 cases (42.3%), slightly hyperechoic and hyperechoic in 7(13.5%); the color Doppler flow imaging showed that the blood supply of lesions was in grade 0 in 11 cases (21.2%), in grade 1 in 9 cases (17.3%), in grade 2 in 28 cases (53.8%), and in grade 3 in 4 cases(7.7%); out of 51 eligible cases of ICC, the CEUS demonstrated that the enhancement performance in arterial phase was in typeⅠ, e.g. rapid overall uniform enhancement, in 10 cases (19.6%), and in type Ⅱ, e.g. rapid uneven enhancement, in 41 cases (80.4%), out of which, in subtype Ⅱa, the overall uneven enhancement, in 19 cases (37.3%), in subtype Ⅱb, the dendritic enhancement, in 9 (17.6%), in subtype Ⅱc, thick-walled irregular ring-like enhancement, in 6 (11.8%), and in subtype Ⅱd, ring-like and dendritic enhancement, in 7 (13.7%).Conclusion ICCs have some CEUS characteristic features, which might help for the early diagnosis.

Key words: Intrahepatic cholangiocarcinoma, Ultrasonography, Doppler ultrasound, Contrast-enhanced ultrasonography, Diagnosis