低位直肠癌是指距离肛缘8cm的直肠癌，其中包括超低位直肠癌，即距离肛缘5cm以下的直肠癌。
Only 2RCTs aimed the middle-low rectal cancer both with quality score5.
仅有2项RCT针对中低位直肠癌，质量评分均为5分。
参考来源 - 腹腔镜辅助直肠癌根治术可行性的临床研究Conclusions Transanal pull-through combined with double stapling technique for low rectal carcinoma is simple and easy to perform for effective anus conservation with low postoperative morbidity and the recurrence rates.
结论 经肛门拖出切除、双吻合技术治疗低位直肠癌保肛成功率高，简单，并发症少，复发率低。
参考来源 - 直肠拖出双吻合治疗低位直肠癌的前瞻性研究The accuracy of T and N stage was respectively 79.2%,84.5%,73.3%and 70.8%,67.6%,66.7%. The accuracy among upper, middle, and lower rectal cancer did not display statistical differences by X2 test (P> 0.05).
高位直肠癌24例,中位直肠癌37例,低位直肠癌15例,三者T分期准确度分别为79.2%、84.5%和73.3%,N分期准确度分别为70.8%、67.6%和66.7%；但经X2检验MRI对T和N分期三者的准确度无统计学差异(P均>0.05)。
参考来源 - 高分辨率MRI在不同节段直肠癌术前评估中的临床应用价值·2,447,543篇论文数据，部分数据来源于NoteExpress
目的探讨局部切除术在低位直肠癌的治疗中的作用。
Objective To study the effects of Local resection in the treatment of rectal cancer of lower position .
目的探讨侧方淋巴结清扫在低位直肠癌治疗中的意义。
Objective To study the significance of lateral lymph nodes sweeping in lower rectal cancer.
目的探讨高龄低位直肠癌患者的最佳手术方式的选择。
Goal discussion advanced age low position Rectal Cancer patient's best surgery way choice.
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