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

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