已有报道认为经直肠超声检查(TRUS)对肿瘤的局部浸润范围和近处淋巴结转移的判断准确率高于其他术前分级。本文通过对直肠癌病例作前瞻性TRUS,评价其对肿瘤分级的准确性,同时通过对错判病例的回顾性临床病理分析指出它的限制和误区。 材料与方法:相继的164例原发性直肠癌病人,病变范围距肛缘15cm以内,作为本研究 It has been reported that transrectal ultrasonography (TRUS) is more accurate than other preoperative classifications in determining the extent of local infiltration and proximal lymph node metastasis of tumors. This article through the prospective TRUS in patients with rectal cancer to evaluate the accuracy of its classification of tumors, at the same time through the retrospective clinical pathological analysis of the cases of misjudgment pointed out its limitations and errors. Materials and Methods: One hundred and sixty-four patients with primary rectal cancer were included. The lesions were within 15cm from the anal verge.