Benefit of Conversion Therapy in Patients with Unresectable Hepatocellular Carcinoma: A Propensity Score-Matched Study

Ruyu Han,1,* Leijuan Gan,1,* Liyu Sun,1 Mengran Lang,2 Xindi Tian,1 Kangwei Zhu,1 Lu Chen,1 Guangtao Li,1 Tianqiang Song1 1Department of Hepatobiliary Cancer, Liver Cancer Center, Tianjin Medical University Cancer Institute & Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin’s Clinical Research Center for Cancer, Tianjin Key Laboratory of Digestive Cancer, Tianjin, 300060, People’s Republic of China; 2Hepatobiliary Surgery Department, National Cancer Center, National Clinical Research Center for Cancer, Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, People’s Republic of China*These authors contributed equally to this workCorrespondence: Tianqiang Song, Department of Hepatobiliary Cancer, Liver Cancer Center, Tianjin Medical University Cancer Institute & Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin’s Clinical Research Center for Cancer, Tianjin Key Laboratory of Digestive Cancer, Tianjin, 300060, People’s Republic of China, Tel +86-22-23340123, Fax +86-22-23537796, Email songtianqiangtj@163.comPurpose: This study aimed to investigate the benefit of conversion therapy for patients with unresectable hepatocellular carcinoma (HCC).Patients and Methods: A retrospective cohort study was conducted involving 40 patients initially deemed unresectable HCC (uHCC). They received surgery following successful conversion therapy involving lenvatinib. The patients were matched in a 1:1 ratio to with a control group who underwent direct surgery, based on pre-treatment clinical data.Results: The median recurrence-free survival (RFS) duration for the conversion therapy cohort was notably longer than that of the direct surgery cohort (25 months vs 11 months). Furthermore, the 1- and 2-year RFS rates were significantly higher in the conversion therapy group compared to the direct surgery group (1 year: 70.5% vs 40.1%; 2 years: 49.0% vs 19.1%). The survival curves indicated a statistically significantly longer RFS in the conversion therapy cohort compared to the direct surgery cohort (P = 0.007). While patients achieving good remission based on both RECIST 1.1 and mRECIST criteria showed superior median RFS, no significant disparity was observed in the survival curves. The subgroup analysis revealed significantly improved prognosis among patients in the conversion therapy group who were male, older, had a history of alcohol consumption, were non-smokers, had liver cirrhosis, possessed Child-Pugh A liver function, had a tumor diameter exceeding 5 cm, and had an AFP ≥ 400 ng/mL. Among the cohort of 40 patients, only 8 individuals encountered severe adverse reactions, which were managed through dose reduction. None of the patients experienced multiple severe adverse reactions concurrently.Conclusion: For patients with unresectable hepatocellular carcinoma, conversion therapy offers a significantly better prognosis than direct surgery for uHCC patients.Keywords: hepatocellular carcinoma, conversion therapy, recurrence-free survival, hepatic resection