手术是胃肠肿瘤的主要治疗手段,但局部晚期患者很难通过单纯手术获得疾病根治,需要通过综合治疗来达到治愈肿瘤的目的,以取得治愈率最大化的同时毒性最小化,获得最佳的生活质量。在局部晚期直肠癌的治疗中,放疗的地位比较肯定,已有相关随机研究结果。但在局部晚期胃癌的治疗中,对于放疗的作用,虽然已有一些随机研究提供了一些循证医学依据,但还存在很多不确定因素。 Surgery is the main treatment of gastrointestinal tumors, but locally advanced patients is difficult to obtain radical cure by simple surgery, the need to achieve the purpose of cure by comprehensive treatment in order to achieve the maximum cure rate while minimizing toxicity, to obtain the best Quality of Life. In the treatment of locally advanced colorectal cancer, the status of radiotherapy is relatively positive, there have been relevant randomized studies. However, in the treatment of locally advanced gastric cancer, the role of radiotherapy, although some randomized studies provide some evidence-based medicine, but there are still many uncertainties.