Feasibility and Safety of the Clinical Outcomes of TACE Combined with Lenvatinib and PD-1 Blockades in the Treatment of Hepatocellular Carcinoma with Portal Vein Tumor Thrombus: A Retrospective Exploratory Study.

Objective: This study aimed to investigate the feasibility of the efficacy and safety of TACE combined with Lenvatinib and PD-1 blockade in HCC with portal vein tumor thrombus (PVTT). Methods: Patients with HCC and PVTT who underwent TACE combined with Lenvatinib and PD-1 blockade as first-line therapy in clinical practice were retrospectively included. All subjects were followed-up regularly to obtain prognostic outcomes. The safety profile observed during the combination therapy was collected and documented. The Log rank test was used for exploratory analysis of prognosis and baseline characteristics and Cox regression analysis was used for multivariate analysis. Results: A total of 67 HCC patients with PVTT who received TACE combined with Lenvatinib and PD-1 blockade were included in this study. The best therapeutic response during treatment suggested that 4 patients achieved complete response, 30 patients showed partial response, 25 patients were stable disease, 5 patients had disease progression and 3 patients were not available. Objective response rate of this regimen was 50.7% [95% confidence interval (CI): 38.2-63.2%] and disease control rate was 88.1% (95% CI: 77.8-94.7%). The median progression-free survival of 67 HCC patients with PVTT who received TACE combined with Lenvatinib and PD-1 blockades was 9.3 months (95% CI: 5.85-12.75), and the median overall survival was 24.4 months (95% CI: 19.11-29.69). The safety profile highlighted that 65 patients experienced adverse reactions regardless of grade during treatment (97.0%), among whom 34 patients were deemed as grade ≥3 adverse reactions (50.7%). The most common adverse reactions were hypertension, fatigue, abnormal liver function, nausea, vomiting, and diarrhea. Overall adverse reactions were acceptable and controllable. Conclusion: TACE combined with Lenvatinib and PD-1 blockades as first-line therapy for HCC with PVTT demonstrated potential feasibility and encouraging clinical outcomes, providing long-term survival benefits for HCC patients. This conclusion should be confirmed in prospective large-scale clinical trials.