The so-called colon CA, CA is malignant. The benign ones are called precancerous lesions, including polyps and benign adenomas, which are benign, but when they develop into cancer, they are no longer benign and are malignant. If cancer develops, the easiest way is to undergo surgery, and about 2/3 of patients can undergo surgery, and the 5-year survival rate after surgery is more than 2/3. Once the cancer has metastasized, chemotherapy, radiotherapy, immunotherapy, etc. can be administered.