未加辅助治疗的直肠癌治愈性切除后局部复发率，各家报道的变异很大，多变量分析提示与多种不同因素有关。悉尼大学结肠直肠外科自1979年采用标准的切除术式，1981年应用了全解剖学分离方法。中、下1／3直肠肿瘤还采用了全直肠系膜切除术，系膜包裹筋膜予以完整切除；上正／3直 The local recurrence rate after curative resection of rectal cancer without adjuvant therapy varied greatly in each case. Multivariate analysis suggested that it was related to many different factors. The University of Sydney Colorectal Surgery has adopted a standard excision procedure since 1979, and in 1981 applied a total dissection method. Middle and lower 1/3 of the rectal tumors also used a total mesorectal excision, mesangial fascia to be completely removed;