Sintilimab Combined With Stereotactic Body Radiotherapy as Neoadjuvant Therapy for Resectable Hepatocellular

This study is a prospective, randomized controlled, phase II trial evaluating the efficacy and safety of neoadjuvant therapy with Sintilimab combined with SBRT in patients with resectable hepatocellular carcinoma. After meeting the inclusion and exclusion criteria and providing informed consent, eligible subjects will be randomly assigned to the experimental group or the control group: * Experimental Group: Subjects will receive Sintilimab 200 mg via intravenous infusion on day 1 of each 3-week cycle, for a total of two cycles. This will be combined with SBRT, administered as 8 Gy per fraction for 3 fractions on days 1, 3, and 5. Surgery will be performed 4-6 weeks after the last treatment, following the assessment of the patient\'s condition. Postoperative adjuvant therapy with Sintilimab monotherapy (200 mg Q3W) will be administered until disease recurrence, death, intolerable toxicity, withdrawal of informed consent, initiation of new antitumor therapy, or other protocol-specified reasons occur, for a maximum of one year. * Control Group:Subjects will undergo surgery directly. Postoperative adjuvant therapy with Sintilimab monotherapy (200 mg Q3W) will be administered until disease recurrence, death, intolerable toxicity, withdrawal of informed consent, initiation of new antitumor therapy, or other protocol-specified reasons occur, for a maximum of one year.