Objective: To analyze the clinical efficacy and safety of cyberknife in the treatment of patients with primary large hepatocellular carcinoma over 70 years old. Methods: A total of 82 patients (58 males and 24 females) with large hepatocellular carcinoma aged over 70 years (70 to 85 years, (75±4) years) with a median tumor diameter of 6.7 cm (5.0~10.0 cm) were retrospectively collected. All patients were diagnosed by pathology or radiography in the Cancer Radiotherapy Center of the Fifth Medical Center of the PLA General Hospital from March 2014 to December 2018, and treated with cyberknife stereotactic radiotherapy. Progression free survival rate (PFS), local control rate (LC), overall survival rate (OS) and adverse reactions were observed at 1, 2 and 3 years. Kaplan-Meier was used for survival analysis, and Cox regression model was used to analyze survival-related factors. Results: All 82 patients successfully completed radiation therapy with a median survival time of 20 months, a median PFS of 10 months, an objective response rate of 64.63% (53/82), and a disease control rate of 85.37% (70/82). After treatment, the PFS at 1, 2, and 3 years were 39.0% (32/82), 22.1% (18/82), and 17.1% (14/82), respectively; the LC at 1, 2, and 3 years were 95.1% (78/82), 92.3% (76/82), and 92.3% (76/82), respectively; and the OS at 1, 2, and 3 years were 68.3% (56/82), 48.8% (40/82) and 31.7% (26/82), respectively. Nine patients suffered from radiation-induced liver disease (RILD), and there were no deaths due to RILD. Cox regression analysis showed that alpha-fetoprotein (AFP) was an independent risk factor for OS (HR=2.304, 95%CI 1.118-4.747;P<0.05). Conclusion: Cyberknife treatment for patients with primary large hepatocellular cancer over 70 years old has higher LC and OS, better curative effect, and less treatment-related adverse reactions.
目的： 分析射波刀对70岁及以上原发性大肝癌患者的临床疗效及安全性。 方法： 回顾性收集解放军总医院第五医学中心肿瘤放疗中心2014年3月至2018年12月经病理或影像学诊断的70岁及以上大肝癌患者82例，男58例，女24例，年龄70~85（75±4）岁，中位肿瘤直径6.7 cm（5.0~10.0 cm），均接受射波刀立体定向放射治疗。观察1、2、3年肿瘤的无疾病进展生存率（PFS）、局部控制率（LC）和总生存率（OS）及不良反应。采用Kaplan-Meier进行生存分析，Cox比例风险模型分析生存相关的影响因素。 结果： 82例患者均顺利完成放射治疗，中位生存期为20个月，中位PFS为10个月，客观缓解率为64.63%（53/82），疾病控制率为85.37%（70/82），治疗后1、2和3年的PFS分别为39.0%（32/82）、22.1%（18/82）和17.1%（14/82），1、2和3年LC分别为95.1%（78/82）、92.3%（76/82）和92.3%（76/82），1、2和3年的OS分别为68.3%（56/82）、48.8%（40/82）和31.7%（26/82）。9例患者出现放射性肝损伤，无因放射性肝损伤死亡病例。Cox回归分析显示甲胎蛋白水平是影响OS的独立风险因素（HR=2.304，95%CI 1.118~4.747，P<0.05）。 结论： 射波刀治疗70岁及以上原发性大肝癌患者的LC和OS高，疗效较好，治疗相关不良反应发生少。.
Keywords: Cyberknife; Liver neoplasms; Radiotherapy, computer-assisted; The aged.