Sigmoid colon cancer has no liver metastasis before surgery, and liver metastasis is possible during chemotherapy. Colorectal cancer is prone to metastasis, and metastasis may also occur after surgical removal of the primary focus please There are many reasons why metastasis cannot be ruled out during chemotherapy even if no liver metastasis is found before surgery for sigmoid colon cancer. On one hand, imaging examination cannot detect all tumors, and tiny foci are usually undetectable; on the other hand, there may be hidden cancer cells in other tissues and organs after primary foci are removed. Although chemotherapy can kill cancer cells in the body, some patients are not sensitive to chemotherapy drugs. The cancer may have metastasized to the urinary system, such as the kidneys, or to the liver or lungs. Metastasis to the urinary system may cause ureteral stenosis; metastasis to the liver may cause pain in the liver area; metastasis to the lungs may cause symptoms such as coughing and hemoptysis. Liver is the primary organ for distant metastasis of colorectal cancer, which is the main factor leading to death. Sigmoid colon cancer patients should actively go to regular hospitals for consultation, and standardize the treatment under the guidance of physician’s face-to-face consultation after surgery, patients should not use medicines by themselves to avoid adverse results.
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