自1976年以来,作者就开始采用术前放疗和根治性括约肌保留手术以治疗低位直肠癌,本文的目的在于观察术■大剂量放疗对:(1)吻合的影响;(2)根治手术的安全性;(3)局部复发的控制;(4)切除范 Since 1976, the authors have begun to use preoperative radiotherapy and radical sphincter preservation surgery to treat low rectal cancer. The purpose of this article is to observe the effect of high-dose radiation therapy on: (1) the effect of anastomosis; (2) the safety of radical surgery (3) Control of local recurrence; (4) Resection