为评价术前高剂量放疗加保肛术治疗低位(距肛齿线2cm内)直肠癌的效果,作者分析了用此方案治疗的259例直肠癌病人,其中70例肿瘤在直肠远端2cm内。男性38例,女性32例,中数年龄63岁。距肛齿线0～1cm 25例,1～2cm 45例,肿块活动36例,活动受限26例,固定8例。疗前均行乙状结肠镜、病理活检和直肠超声检查。如需要也行钡灌肠、静脉肾盂造影、CT、MRI等检查。术前放疗为 To evaluate the effect of preoperative high-dose radiotherapy and anal-preserving surgery on rectal cancer in the low position (from within 2 cm of the anal line), the author analyzed 259 cases of rectal cancer treated with this protocol, of which 70 cases were within 2 cm of the rectum. . There were 38 males and 32 females, with a median age of 63 years. From the anal tooth line 0 ~ 1cm 25 cases, 1 ~ 2cm 45 cases, mass activity in 36 cases, limited activity in 26 cases, fixed in 8 cases. Sigmoidoscopy, biopsy, and rectal ultrasonography were performed before treatment. If necessary, you can also take a bowel enema, intravenous pyelography, CT, MRI and other tests. Preoperative radiotherapy is