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。
2
Therefore, the research and attention to colitis-related precancerosis of colonic carcinoma become the hotspot for secondary prevention in recently years.
因此，对结肠炎相关性结肠癌前病变的研究和关注成为近年来结肠癌二级预防的热点。
3
Objective to evaluate the value of transhepatic arterial chemoembolization (TACE) combined with secondary hepatectomy for advanced primary liver carcinoma.