Why should I get screened if I don’t have any symptoms?
According to the American College of Gastroenterology, adenomas can grow for years and transform into cancer without producing any symptoms. By the time symptoms develop, it is often too late to cure the cancer, because it may have spread. Screening identifies cancers earlier and results in cancer prevention when it leads to removal of adenomas (pre-cancerous polyps).
Colon cancer screening fact sheet
Fact: Most early colorectal cancers produce no symptoms
According to the American College of Gastroenterology, this is why screening for colorectal cancer is so important. Symptoms of colorectal cancer vary depending on the location of the cancer within the colon or rectum, and there may be no symptoms at all. The prognosis tends to be worse in symptomatic than asymptomatic individuals. The most common presenting symptom of colorectal cancer is rectal bleeding.