[Preliminary clinical use of hepatic arterial infusion chemotherapy combined with lenvatinib and tislelizumab in the treatment of unresectable intrahepatic cholangiocarcinoma].

Objective: To evaluate the efficacy and safety of hepatic arterial infusion chemotherapy (HAIC) combined with lenvatinib and tislelizumab in the treatment of unresectable intrahepatic cholangiocarcinoma (ICC). Methods: The clinical data of 12 patients with unresectable ICC who received HAIC combined with lenvatinib and tislelizumab in the First Affliated Hospital of Soochow University from October 2021 to April 2023 were retrospectively analyzed. HAIC included gemcitabine plus oxaliplatin; this regimen was combined with lenvatinib and tislelizumab within 3-7 days after its initial administration. Relevant laboratory examinations were performed before each cycle of HAIC, and enhanced computed tomography/magnetic resonance imaging examinations were performed every 6-9 weeks. Tumor response to treatment was evaluated using the modified Response Evaluation Criteria in Solid Tumors. The objective response rate, disease control rate, progression-free survival, overall survival, and treatment-related adverse reactions of patients with ICC were statistically analyzed. Results: The objective response rate to HAIC combined with lenvatinib and tislelizumab was 6/12; the disease control rate was 8/12; the median progression-free survival was 11.8 months; and the median overall survival was 14.2 months. Three patients had grade Ⅳ adverse reactions (increased alanine aminotransferase and aspartate aminotransferase thrombocytopenia), while three patients had grade Ⅲ adverse reactions (increased total bilirubin, alanine aminotransferase, and aspartate aminotransferase). The remaining patients had grade Ⅰ-Ⅱ adverse reactions. There were no serious complications related to interventional surgery. Conclusions: Use of HAIC (gemcitabine plus oxaliplatin) combined with lenvatinib and tislelizumab in the treatment of unresectable ICC may be safe and feasible. Preliminary clinical studies have shown that this combination can improve the survival and prognosis of patients with ICC.