Patient guide

Colorectal cancer surgery

A simple guide to how colon and rectal cancers are assessed and how treatment is planned. The plan depends on the tumour’s location, size and spread, the biopsy result, your general health, and discussion between the surgeon, oncologist, radiologist and pathologist.

Last updated: September 2026 · Educational information; it does not replace individual medical assessment.

How is the operation planned?

  • Reviewing the colonoscopy and biopsy result
  • Using the appropriate scans to understand the tumour’s size and how far it has spread
  • Assessing fitness for surgery, nutrition and other medical conditions
  • Discussing the case with oncology, radiology and pathology specialists when needed
  • Choosing laparoscopic or open surgery according to what is safest and most suitable

What might surgery involve?

Surgery usually removes the part of the colon or rectum containing the tumour, together with nearby lymph nodes. The bowel is then joined again when it is safe to do so. Some rectal operations may require a temporary or permanent opening on the abdomen for stool to pass. The surgeon explains the exact operation after reviewing the scans and biopsy result.

After surgery

Recovery time varies according to the operation and the patient’s condition. Care includes pain relief, early movement, breathing exercises, nutrition and preventing blood clots. Once the final tumour analysis is available, the team decides whether further cancer treatment or follow-up alone is needed.

Important questions to ask

  • Where is the tumour, how large is it, and how far has it spread?
  • What operation is recommended and why?
  • Is laparoscopic surgery suitable for me?
  • Could I need an opening for stool to pass, and would it be temporary or permanent?
  • What are the main risks in my case?
  • What recovery and follow-up should I expect?

Clinics & booking

FROM DIAGNOSIS TO RECOVERY

Questions before colorectal cancer surgery

Does every patient need the same treatment?

Treatment depends on the diagnosis, tumour location and stage, test results and your general health. Some early cancers can be removed locally; others require removal of the affected bowel and nearby lymph nodes. Other treatments may form part of the plan. Bring your colonoscopy, biopsy and scan reports.

Why might treatment start before rectal surgery?

Some rectal cancers need chemotherapy, radiotherapy or both before surgery. The sequence depends on staging and tumour features. Ask about the aim of each step, when the response will be reassessed, and whether a temporary or permanent stoma might be needed.

What helps recovery after bowel surgery?

Recovery includes pain control, early supported walking, and restarting food and fluids when your team considers it appropriate. Before discharge, ask for written instructions for activity, wound care, eating, follow-up and urgent symptoms. Return to work depends on the operation and your progress, rather than a fixed date for everyone.

Updated 18 October 2026 · Further reading: NCI · Colon · NCI · Rectum · ASCRS · Recovery

Plan your consultation and recovery

Recovery varies with the operation and your health. Ask about hospital stay, help at home, returning to work and activity, and your own diet, medicine and follow-up plan. Request written instructions and signs that should prompt urgent contact.

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