局部晚期胰腺癌三维适形放射治疗疗效观察  

Therapeutic effect of three-dimensional conformal radiotherapy on locally advanced pancreatic carcinoma

作　　者：石玉生[1] 徐素俊[1] 郑小康[1] 闫卫平[1] 陈龙华[1] 

机构地区：[1]第一军医大学南方医院放疗科,广东广州510515

出　　处：《第一军医大学学报》2004年第2期213-215,219,共4页Journal of First Military Medical University

摘　　要：目的 评价两种适形放疗方法对局部晚期胰腺癌的疗效。方法 67例局部晚期胰腺癌患者接受适形放射治疗，采用真空垫进行体位固定，增强CT扫描定位，三维治疗计划系统模拟治疗计划。患者随机分为A、B两组：A组单次放射剂量5～6Gy，3次／周，总剂量45～54Gy／8-12F／18～27D；B组单次放射剂量3Gy，5次／周，总剂量45～54Gy／15-18F／20～25D。结果 放疗后1个月腹、背痛缓解总有效率95．9％，完全缓解率81．6％，A、B组分别为95．7％和69．2％；两组整体肿瘤退缩率为67.2％，A、B组分别为81．8％和51．6％；中位生存期12．5个月，A、B组患者2年生存率分别为35.3％和12．1％。结论 低分割照射局部晚期胰腺癌，靶区单次剂量大对肿瘤杀伤作用强，而靶区周围正常组织剂量低，放射反应小，疗效肯定。Objective To evaluate the effects of the two conformal radiotherapy modalities in the treatment of locally advanced pancreatic carcinoma. Methods From October, 1998 to June, 2001, 67 patients with locally advanced pancreatic carcinoma received conformal radiotherapy (CRT). Vacuum cushions were applied to immobilize the patients before contrast CT scans, the treatment plans were simulated by three-dimensional treatment planning system. The patients were randomized into group A to receive a total dose of 45-54 Gy given in 8-12 fractions completed in 18-27 d and group B with a total dose of 45-54 Gy in 15-18 fractions within 20-25 d. Results The partial and complete pain relief rates of the two groups were 95.9% and 81.6%, respectively, one month after the completion of the radiotherapy, with a median survival of 12.5 months. The response rates of the patients and the 2-year overall survival rates in group A were 81.8% and 51.6%, respectively, and were 35.3% and 12.1% in group B. The low-dose fractionated CRT was superior than accelerated CRT. Conclusion For patients with unresectable pancreatic cancer receiving low-dose fractionated CRT, a high dose targeted at the tumor can be given in a fraction and the normal surrounding tissues are exposed to low-dose radiation, to achieve good therapeutic effect with minimized adverse effects on normal tissues in relation to the exposure.

关 键 词：局部晚期胰腺癌 三维适形放射治疗 真空垫 CT增强扫描 对症治疗 支持治疗 

分 类 号：R735.9[医药卫生—肿瘤] R730.55[医药卫生—临床医学]