Colon Cancer Surgery: What to Expect

A colon cancer diagnosis brings a flood of information at once. This guide lays out the surgical pathway in order, so you and your family know what each step involves and can prepare calmly. Bring your questions to the consultation — and bring a family member, because two sets of ears always hear more than one.

Step 1 — Confirmation and Staging

• Colonoscopy with biopsy — the test that finds the tumour and confirms the diagnosis on tissue examination. Details: colonoscopy facility.
• Blood tests — including CEA, a tumour marker used for baseline and follow-up tracking.
• CT scans (chest and abdomen) — to check the extent of disease and plan the operation.
• Pre-anaesthesia review — fitness assessment and optimisation before major surgery.

Step 2 — The Operation (Colectomy)

The surgeon removes the segment of colon containing the tumour, together with its blood supply and the surrounding lymph nodes — nodes matter both for cure and for accurately understanding the cancer's stage. The healthy ends are then joined back together (an anastomosis). Which segment is removed depends on the tumour's location:

Where the tumour and patient allow, the operation is done laparoscopically — read about our colectomy service and the wider colon surgery department.

Step 3 — The Stoma Question

A stoma (an intestine brought out through the abdominal wall into a bag) is needed more often for rectal than colon surgery, and it is frequently temporary — allowing the join to heal before reversal. If a stoma is possible in your case, the surgeon will discuss it before the operation, and our nursing team will train you in stoma care before discharge.

Step 4 — Hospital Stay and Recovery

Enhanced-recovery practice gets patients eating and walking early: typically a few to several days in hospital after laparoscopic surgery, pain controlled with a planned regimen, diet rebuilt in stages, and discharge once wounds are settling and bowels are moving. Full inner healing takes 6–8 weeks; our bowel-recovery diet guidance and the dietetics team help you rebuild strength and weight afterwards.

Step 5 — What Happens After Surgery

The removed specimen is examined in the laboratory — this final pathology report (stage, nodes, margins) guides any additional treatment such as chemotherapy, which oncologists plan on its basis. Long-term follow-up typically includes scheduled clinic reviews, periodic CEA blood tests, imaging and a surveillance colonoscopy about a year after surgery. Your team will give you the exact calendar.