A colectomy is the resection of a segment of the colon with restoration of continuity (anastomosis). In cancer it includes a lymphadenectomy. It is performed laparoscopically or robotically, with ERAS protocols for faster recovery.
What is a colectomy?
It is the resection of a segment of the colon (right, left or sigmoid colectomy, depending on the lesion's location) with restoration of continuity by an anastomosis. In cancer, the operation follows strict oncological principles.
Decisive are anatomical resection with the mesocolon (complete mesocolic excision) and central vascular ligation, so that the tumour's lymphatic drainage is removed en bloc — a factor that improves the oncological outcome.
When is it needed?
The main indication is colon cancer. It is also indicated for complicated diverticular disease (recurrent, stricture, fistula), large or dysplastic polyps not removable endoscopically, and selected inflammatory bowel disease.
In cancer, the decision and planning are made at a multidisciplinary team after full staging.
Preparation
It is preceded by colonoscopy with biopsy and lesion marking, staging with chest/abdomen CT and a CEA level. An enhanced-recovery (ERAS) protocol is applied: nutritional preparation, avoiding prolonged fasting, thromboprophylaxis and, where appropriate, bowel preparation.
How it's done
The operation is performed chiefly laparoscopically or robotically, with an open approach in selected cases. The affected segment is mobilised, the feeding vessels are ligated centrally together with the mesocolon (CME), and the segment is removed with adequate margins and lymph nodes.
Continuity is restored with a safe anastomosis; a stoma is rarely needed in planned resections. The minimally invasive approach offers equivalent oncological adequacy with faster recovery.
Laparoscopic
Resection through small incisions with oncological adequacy, less pain and faster recovery.
Robotic
Added precision and comfort in complex resections — especially the left/sigmoid.
Open
For emergency or complex cases, when it serves safety and oncological completeness.
Recovery
With an ERAS protocol, mobilisation and eating start early and discharge is usually within 3–5 days, depending on the return of bowel function. Full recovery scales over a few weeks.
In cancer, the final histology determines the need for adjuvant therapy and the surveillance plan, decided by the multidisciplinary team.
Risks & outcomes
The most important specific complication is an anastomotic leak; it is minimised by correct technique and perfusion and treated promptly. Others: prolonged ileus, bleeding, infection, thromboembolic events.
Markers of oncological quality are clear margins and an adequate lymph-node count. "Success" means a complete (R0) resection with a safe anastomosis and a smooth recovery.
Frequently asked questions
Will I need a stoma?
In most colectomies continuity is restored immediately with an anastomosis and no stoma is needed. In selected, mainly emergency or low anastomoses, a temporary protective stoma may be required.
Is laparoscopic colectomy safe for cancer?
Yes. Laparoscopic/robotic colectomy offers oncological outcomes equivalent to open surgery, with less pain and faster recovery.
How long will I stay in hospital?
With ERAS protocols, usually 3–6 days depending on the extent of the operation and the recovery.
Will I need further treatment?
In malignant cases, the need for adjuvant therapy is decided at the tumour board, based on stage and histology.