作者采用剂量加速分割法对65例直肠原发癌和术后复发癌进行放疗。男32例,女33例,多数病人的年龄为51～80岁。59例为腺癌。病人分为两组:第Ⅰ组(原发癌39例):肛门及直肠下壶腹部癌18例;整个壶腹部癌2例。4例为T_2N_xMo,11例为T_3N_xMo,24例为T_4。第Ⅱ组术后复发癌(26例):骨盆后部9例,侧部1例,前部1例,会阴处瘢痕 The authors used dose-scaling method to perform radiotherapy on 65 cases of primary rectal cancer and postoperative recurrent cancer. There were 32 males and 33 females. The majority of the patients were 51 to 80 years old. 59 cases of adenocarcinoma. The patients were divided into two groups: Group I (39 cases of primary cancer): 18 cases of anal and lower rectal ampulla; 2 cases of ampulla of the entire stomach. Four cases were T_2N_xMo, 11 cases were T_3N_xMo, and 24 cases were T_4. Group II recurrence after operation (26 cases): 9 cases in posterior pelvis, 1 in lateral, 1 in anterior, scar at perineum