Can colon cancer be checked by colonoscopy?

Why is colonoscopy necessary for colorectal cancer? Colonoscopy can help doctors understand the symptoms of colorectal cancer more quickly and help them to provide more appropriate treatment. Here, we will introduce the necessity of colonoscopy for colorectal cancer. Let's learn about it together. Can colonoscopy be used to check colorectal cancer?

More than 70% of colorectal cancer occurs in the rectum and sigmoid colon. Colonoscopy is the most effective means of detecting early colorectal cancer. Colonoscopy can not only clearly observe the intestines, but also clamp suspicious lesions for pathological examination under direct vision, which is conducive to the discovery and diagnosis of early and small colorectal cancer.
Another significance of colonoscopy is that it can detect and treat intestinal polyps, especially precancerous lesions such as adenomatous polyps, through minimally invasive endoscopy. Studies have found that most colorectal cancers originate from adenomas that become cancerous. It may take several years or even longer for adenoma to develop into cancer. If adenoma can be detected and treated with minimally invasive endoscopy in the asymptomatic stage before it becomes cancerous or in the early stage of cancer, the chance of it turning into cancer can be blocked.