Cancer education

Colon & rectal cancer

Colon and rectal cancers are treated differently in some important ways. Surgery and medical oncology are central for many patients; radiation is used more often for rectal cancer and in selected other situations.

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Role of radiation

For rectal cancer, radiation (often with chemotherapy) is frequently given before surgery to shrink the tumor and improve the chance of complete removal, or sometimes after surgery. For colon cancer, radiation is less often the main treatment but may be considered if the tumor is attached to nearby structures, if surgery leaves residual disease, or to relieve symptoms from metastatic sites (such as bone or other painful areas).

Planning focuses on the tumor or surgical bed while protecting bowel and other organs as much as possible.

Surgery & medical oncology

Surgery to remove the affected bowel segment and nearby lymph nodes is the cornerstone of curative treatment for many colon cancers.

Medical oncology may recommend chemotherapy before or after surgery, and additional drugs for advanced or metastatic disease.

Care is coordinated across specialties at the Cancer Care Center so sequencing of surgery, chemo, and radiation is clear.

What patients often ask

  • Do all colon cancers need radiation? No — many do not. Rectal cancers more often include radiation in the plan.
  • Why chemoradiation before rectal surgery? To shrink disease and support better surgical outcomes in appropriate cases.
  • Your team will explain bowel side effects and how to manage them during treatment.

Other cancer education pages

Breast cancer Lung cancer Prostate cancer Colon & rectal cancer Gynecologic cancers How cancer care works

General education only — not a personal treatment recommendation. Call the office with questions about your care.

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