Most colon cancers originate from precancerous lesions that can be detected and removed by colonoscopy, but cancers after colonoscopy (interval cancers) still account for 9% of all colon cancers. Incomplete colonoscopies, missed diagnoses, rapid Progressive lesions, iatrogenic tumor dissemination, and incomplete resection of lesions may be causes of interval colon cancer, emphasizing the importance of accurate detection and complete resection of all polyps.

Content points:

1. Adjuvant chemotherapy after colon cancer surgery 2. When does colon cancer require targeted therapy?

At present, the preferred method for the treatment of colon cancer is radical surgery, followed by radiotherapy and chemotherapy. The new view is that if the metastatic lesions can be resected at the same time, they should be resected together with the colon cancer lesions.

If the metastases cannot be resected, then Adjuvant chemotherapy is performed first, and then resection is performed after stabilization. For unresectable tumors or those with distant metastases, local radiotherapy is also one of the commonly used methods in the treatment of advanced colon cancer. It can shrink the tumor and improve the patient's symptoms. It is often combined with other Combined application of treatment options.

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