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目的：探付低位宜肠癌保肛手术适应证选择标准评价保肛术后临床效果。方法：根据肛门指诊、直肠腔内超声、盆腔CT、MRI、术前活检病理，在265例低位直肠召中选择155例用支撑吻合管经肛门环扎式结肠－直肠（肛管）吻合术。低位宣肠保肛手术适应证选择标准：高中分化腺癌、隆起型、未浸透深肌层、环周度＜1／2周，无肠旁淋巴结肿大、距齿状线Icm以上。高中分化腺癌、溃疡型＞及儿周，浸透肠壁深肌层、
OBJECTIVE: To evaluate the clinical effect of sphincter preserving surgery on the selection criterion of sphincter preserving operation for low-grade colorectal cancer. METHODS: According to anal examination, endorectal ultrasound, pelvic CT, MRI, and preoperative biopsy, 155 patients underwent transrectal transection and anastomosis of colon-rectal (anal) anastomosis were selected in 265 cases of low rectum call. . The low-incision bowel sphincter preservation surgery indication selection criteria: high-grade differentiated adenocarcinoma, uplift type, unsoaked deep muscle layer, circumferential degree < 1/2 weeks, no paraneoplastic lymph nodes, from the dentate line Icm or more. High-grade differentiated adenocarcinoma, ulcer type, and children’s week, infiltrating the deep wall of the intestinal wall,