China and the United States are both populous countries, and the United States in the disease, especially cancer prevention at the forefront of the world, many of its policies and the promotion of the effect of our country, are very valuable experience, and even have a lot to learn from the people. The implementation of colonoscopy screening effectiveness is obvious As early as 2000 years ago, Americans realized that colorectal cancer has become one of the major cancers suffered by the population. According to the U.S. Cancer Statistics Report in the 1990s, the incidence rate of colorectal cancer was 1 per 1,000 men and 0.6 per 1,000 women. The number of deaths caused by colorectal cancer ranks among the top three in terms of cancer-related mortality. In 2012, the Hong Kong media reported that Japanese Prime Minister Shinzo Abe was suffering from ulcerative colitis, and was repeatedly rumored to be suffering from colorectal cancer. The local media compared two photos taken 2.5 years apart and said that Abe might actually be suffering from cancer. Comparing the photos of Abe taken at the end of 2012, it was pointed out that Abe’s face had many more wrinkles, his face had become darker, and he did not look good. The report pointed out that Abe was diagnosed with ulcerative colitis when he was in college, and it was deduced that he had been suffering from the disease for 45 years. Further statistics found that the older the age, the greater the risk of colorectal cancer incidence. Therefore, the U.S. government took resolute measures, the most important of which was the recommendation of “annual screening colonoscopy” for citizens over the age of 50. At that time, colonoscopy coverage in the United States was only 21% of the corresponding population. Over time, the likelihood of a colonoscopy in the U.S. is now about 65% for those over 50. Turning to the 2017 U.S. Cancer Statistics Report, the incidence of colorectal cancer is declining and, by now, stands at 0.6 per 1,000 men and 0.27 per 1,000 women. That means that hundreds of thousands of loved ones, relatives, and friends in the United States who would have faced a colorectal tumor this year, or even death, have been spared the fate of a colorectal tumor thanks to a colorectal screening. How Screening Colonoscopies Can Prevent Colon Cancer It has been said that colorectal polyps are a “precursor” to colorectal cancer, and this is actually true. It is now clear that at least 80%-95% of colorectal cancers evolve from intestinal polyps step by step: small polyps → large polyps → severe atypical hyperplasia → carcinoma in situ → invasive carcinoma. Generally this process may take 5-15 years (of course, there are a few cases of faster progress) Colorectal polyps is said to be the surface of the intestinal mucosa on the elevated lesions, commonly known as the long in the intestinal tube on the inside surface of the “meat bumps”. If a polyp develops in the intestinal tract, it will not be felt, and it is difficult to recognize it subjectively. There are good polyps and bad polyps. Some polyps are relatively safe, while others do not go away on their own, and if left untreated, they can grow slowly and have a higher chance of becoming cancerous. At this time, colonoscopy will show its great role, no feeling of colon polyps in the colonoscopy nowhere to hide, can be instant endoscopic resection. This operation is less traumatic, short hospitalization time, and can effectively cut off the path of polyp cancer. It usually takes more than 15 years for colorectal tumors to progress from benign to malignant, and if detected at an early stage and surgically removed, the cure rate is very high (more than 90%). Screening tools such as colonoscopy are effective in detecting early tumors, and it is its popularity that has allowed the United States to significantly reduce the incidence of malignant colorectal cancer. What is the situation in China? According to the 2015 China Cancer Statistics Report, the incidence of colorectal cancer in China is climbing year by year, but the percentage of people over 50 receiving colonoscopy is less than 15%. So it seems that we still have a long way to go! Take action and urge people over 50 to include colonoscopy in their checkups to stay away from cancer and cherish their health!