The incubation period of colon cancer varies from person to person, it may be around 0.5-1 year or even longer. There are many causes of colon cancer, and some patients have malignant transformation from colon polyps or villous adenomas. The malignant transformation of colon polyps into colon cancer may take a longer period of time, which may range from 1-2 years to 5-10 years, both of which are possible. In the case of choriadenomas, the relative time to malignancy may be shorter. Colon polyps or villous adenomas may lead to changes in bowel movements, such as thinning of stools, increased frequency of bowel movements, or black stools or bloody stools, so it is necessary to go to the hospital in time for examination of intestinal symptoms, including colonoscopy, and if polyps or adenomas can be found inside the colon in the colonoscopy, it should be removed as much as possible, because the history of the disease will be longer. If polyps or adenomas are found in the colon during colonoscopy, they should be removed as much as possible, because the history of the disease is long enough to develop into colon cancer.