The primary treatment for colon cancer is surgery that removes part or all of the colon. Suggestive of polyps, though small, can be removed by colonoscopy.
Chemotherapy after surgery can extend survival of people whose cancer has spread to nearby lymph nodes.
Radiation therapy after surgery does not help people with colon cancer, but it extends the survival of cancer patients.
Given before surgery, radiation therapy can shrink the tumor. This can improve the chances that the tumor is successfully removed.
Radiation before surgery reduces the risk of cancer recurrence after treatment.
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