自幼年代以来，国外应用直肠腔内超声进行术前直肠癌分期，取得了良好的结果。为直肠癌的诊治及预后判断提供了新的工具。1直肠癌术前分期中的应用腔内超声应用于直肠癌术前分期的准确性评价，国外已经有很多报告。其分期标准与TNM分期或Dukes分期一致，并将此与术后病理分期相 Since childhood, foreign application of rectal ultrasound to preoperative rectal cancer staging has achieved good results. It provides a new tool for the diagnosis, treatment and prognosis of rectal cancer. The application of intraluminal ultrasound in the preoperative staging of rectal cancer is used to evaluate the accuracy of rectal cancer preoperative staging. There have been many reports abroad. The staging criteria is consistent with the TNM staging or Dukes staging, and this is in contrast to postoperative pathological staging.