Colorectal cancer is a type of cancer that begins in the colon or the rectum, which are parts of the digestive system. It is the third most common cancer worldwide and is highly treatable if detected early. Risk factors for colorectal cancer include age, genetics, diet, lifestyle factors, and certain medical conditions such as inflammatory bowel disease. Screening tests, such as colonoscopies, can help detect colorectal cancer early when it is most treatable. Treatment options for colorectal cancer may include surgery, chemotherapy, radiation therapy, and targeted therapy. Researchers are constantly studying new ways to prevent, diagnose, and treat colorectal cancer to improve outcomes for patients.