Phase II-III Clinical Trial of PD1 Antibody (Toripalimab), Lenvatinib and GEMOX Neoadjuvant Treatment for Resectable Intrahepatic Cholangiocarcinoma With High-risk Recurrence Factors

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Intrahepatic cholangiocarcinoma (ICC) is a malignant tumor of biliary epithelial cells that originates from the branches of the intrahepatic bile duct at the second level and above. Its incidence accounts for about 15%-20% of primary liver malignancies, showing a gradual increase trend. Surgical res...

Intrahepatic cholangiocarcinoma (ICC) is a malignant tumor of biliary epithelial cells that originates from the branches of the intrahepatic bile duct at the second level and above. Its incidence accounts for about 15%-20% of primary liver malignancies, showing a gradual increase trend. Surgical resection is currently the main method for the treatment of ICC. The data of a large number of ICC cases shows that even radical resection (R0) patients have an average survival of only 18.3 months, while for palliative resection patients, the average survival is only 6.6 months, and laparotomy patients only 5.6 months. Retrospective studies reported that positive resection margins, lymph node metastasis, lymphatic vessel invasion, nerve bundle invasion, preoperative CA199>200U/ml, multiple tumor nodules and differentiation are the main factors affecting the survival of ICC patients after surgery. How to improve the surgical results of ICC patients, especially those with high risk factors for postoperative recurrence, is an important way to improve the overall survival of ICC. Neoadjuvant therapy refers to some treatments taken before surgery for newly treated tumor patients who have not found distant metastasis, including chemotherapy, radiotherapy, targeted therapy, etc., to reduce tumors, reduce tumor stages, and reduce postoperative recurrence rate, prolonging survival time. Our previous study using Toripalimab combined with lenvatinib and Gemox chemotherapy in the first-line treatment of unresectable advanced cholangiocarcinoma (NCT03951597,2020ESMO) showed that the ORR was 80% and the DCR reached 93.3%, of which 1 case was CR, 23 cases were PR, and 2 cases were successfully treated with radical resection after downstage. And the adverse reactions are controllable. These data suggest that Toripalimab combined with lenvatinib and Gemox chemotherapy may be an ideal neoadjuvant treatment for patients with resectable intrahepatic cholangiocarcinoma with high-risk recurrence factors, needing more investigation.

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