Therefore, a secondary infiltration or metastasis to the colon and rectum must be excluded before a definite diagnosis of primary colorectal signet ring cell carcinoma can be established.

因此，在原发性结直肠印戒细胞癌明确诊断前必须排除其它器官的直接浸润或转移至结直肠。

youdao

Objectives To study the extent and method in laparoscopic clearance of lymph nodes during radical operation for carcinoma of rectum and sigmoid colon.

目的研究经腹腔镜行乙状结肠、直肠癌根治术中淋巴结清扫的范围和方法。

youdao

Conclusion: the three dimensional conformal radiation therapy is better for postoperative recrudescent patients with carcinoma of rectum, better than conventional radiotherapy.

结论：对于术后复发的直肠癌患者行三维适形照射优于以往常规照射方式。

youdao