Metastasis can occur in sigmoid colon cancer, especially in advanced or locally advanced colon cancer. The metastatic sites of sigmoid colon cancer are as follows: 1. peri-intestinal lymph node metastasis, once peri-intestinal lymph node metastasis occurs, retroperitoneal and supraclavicular lymph node metastasis may occur. 2. the most common metastatic sites of sigmoid colon cancer include liver, lung, bone, brain and other parts, especially lung, because the blood circulation of sigmoid colon cancer returns through portal vein return, and the blood circulation through portal vein return may go through portal vein to lower cavity and then to lung, resulting in multiple metastases of lung. 3. liver metastasis is also a metastasis. 3.Liver metastasis is also a good site for metastatic disorders. Sigmoid colon cancer can occur in lymph node metastasis and also in distant metastasis through blood circulation.