Abstract: Objective The aim of this study was to explore the value of three-dimensional CT reconstruction in evaluating theresectability of tumorsin patients withhilar cholangiocarcinoma. Methods 89 patients with hilar cholangiocarcinoma were admitted to our hospital from May 2016 through May 2019,and underwent surgical removal of tumors. Before operation, all the patients received three-dimensional reconstruction of conventional CT scan to determine Bismuth-Corlette classification, peripheral vascular involvement and lymph node metastasis. Results The post-operational histopathological examination showed that out the 89 patients, there wereBismuth-Corlette class Ⅰ in 13, class Ⅱ in 13, class Ⅲa in 11, class Ⅲb in 28 and class Ⅳ in 24, and the accuracy (Ac) of CT reconstruction was 93.3%; as to the efficacies of CT reconstruction in judging hepatic artery and portal vein involvement as wellaslymph node metastasis, the Kappa values were 0.7, 0.7 and 0.3, the sensitivities (Se) were 87.5%, 87.5% and 62.5%, the specificities (Sp) were 89.2%, 86.0% and 75.3%, the Acs were 88.8%, 86.5% and 73.0%, the positive predictive values (PPV) were 75.0%, 77.8% and 35.7%, and the negative predictive values (NPV) were 95.1%, 92.5% and90.2%,respectively; the Kappa was 0.7, the Se was 98.2%, the Sp was 65.6%, the Ac was 86.5%, the PPV was 83.6% and the NPV was 95.5% by CT reconstruction in evaluating theresectability of tumors. Conclusion The application of CT three-dimensional reconstruction before operation in patients withhilar cholangiocarcinoma could help display Bismuth-Corlette typing, peripheral vascular involvement and lymph node metastasis, which might be useful in judging theresectability of tumors.

Key words: Hilar cholangiocarcinoma, CT, Three-dimensional reconstruction, Surgery