Because colon cancer is curable in its early stages, the key to survival is early detection. If everyone aged 50 and older had regular colorectal cancer screening tests, more than one third of deaths from colon cancer could be avoided. Once diagnosed, if it is treated in the early stages, between 80% and 95% of colon cancer patients return to their normal health.
Screening for colorectal cancer should begin soon after turning 50 and continue at regular intervals. However, testing may need to happen earlier, or more often, in some people than in others if:
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The patient or a close relative has had colorectal polyps or cancer
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The patient has inflammatory bowel disease
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The patient has worrisome symptoms such as rectal bleeding or blood in stool, anemia, change in bowel habits, abdominal cramps and pain or unexpalined weight loss