目前,手术切除仍然是治疗直肠癌的主要方法,但低位直肠癌因为解剖结构及空间的特殊性,使部分患者无法保肛而为患者术后带来不便;或因切除范围不够而复发,增加了患者痛苦。低位直肠癌术前小剂量放疗可提高保肛率及手术根治切除率,提高患者的生存质量及生存期。2006年3月至2008年 Currently, surgical resection is still the main method for the treatment of rectal cancer. However, because of anatomical structure and space specificity, low rectal cancer can make some patients unable to protect the anus and cause inconvenience to the patient after operation or recurrence and increase due to insufficient resection scope Patient suffering. Low-dose low-dose radiotherapy for low rectal cancer can increase the rate of anus retention and radical resection, and improve the quality of life and survival of patients. March 2006 to 2008