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作者的材料为欧洲肿瘤治疗研究协会,胃肠道肿瘤协作组在多个治疗中心间协作前瞻性研究直肠癌术前高剂量放疗(34.5Gy)的结果。病人经组织学证实为直肠局部(距肛缘15cm 以内)腺癌,属国际抗癌联盟(UICC)1968年的TNM 分类标准之T_2至T_4N_0M_0肿瘤。共评价318例,年龄24～83岁,平均60岁。全部病例平均随访3年,生存的病例13%已随访5年以上。152例行术前放疗,用超高压机器(首先Betatron 或直线加速器)。照射野两个前后平行对穿野,其下界在闭孔下缘,上界在
The authors’ materials are the European Society of Oncology Therapeutics, the Collaborative Group on Gastrointestinal Oncology, and a collaborative prospective study of preoperative high-dose radiation therapy (34.5 Gy) in multiple centers. The patient was histologically confirmed to be a rectal part (within 15cm from the anal verge) of adenocarcinoma, belonging to the TNM classification T_2 to T_4N_0M_0 tumors of the International Union Against Cancer (UICC) in 1968. A total of 318 cases were evaluated, aged 24 to 83 years, with an average age of 60 years. All cases were followed up for an average of 3 years. 13% of the surviving cases had been followed up for more than 5 years. Preoperative radiotherapy was performed in 152 patients using an ultra-high pressure machine (first Betatron or linear accelerator). The two fields of the radiation field are parallel to the field and the lower boundary is at the lower edge of the closed hole. The upper boundary is