Medical Oncologist
CION Cancer Clinics
Colon cancer surgery: what your options are | CION Cancer Clinics
Most colon cancers are treated with an operation that removes the part of the colon holding the tumour, along with its lymph nodes, and then rejoins the bowel. A few very early cancers can be removed through a colonoscope instead. Which option you are offered depends on where the tumour sits, how far it has grown, whether the bowel is blocked and how fit you are. This page sets out each option and who it suits. At CION Cancer Clinics, a multidisciplinary team plans colon cancer treatment for your stage, from surgery to chemotherapy and follow-up.
MM
Medically reviewed by Dr. Muralidhar MuddusettyConsultant Surgical Oncologist · MBBS (AIIMS), MS (Surgery, AIIMS), DNB (Surgical Oncology), MRCS (Edinburgh) · last reviewed October 2026, next review due October 2027
17+specialists on panel
15,000+patients treated
35+centres across Telangana & AP
4.8★ / 800+Google rating
On this page
- What are the surgery options for colon cancer?
- Which operation fits which situation?
- How is the surgical decision actually made?
- What do the words on the consent form mean?
- What do families often get wrong about colon surgery?
- What this page cannot tell you
- Common questions about colon cancer surgery options
The short answer
What are the surgery options for colon cancer?
For most people, the main option is a colectomy. That is an operation to remove the part of the colon holding the tumour, together with the lymph nodes, the small glands that drain that part of the bowel. The two healthy ends are then joined again. A few very early cancers, caught inside a polyp, can be removed through a colonoscope with no cut on the tummy at all.
Three questions shape the choice
Where in the colon is the tumour? How deep has it grown, and has it spread? Is the bowel open, or is it blocked or torn? The answers decide which part of the colon comes out, whether the operation is planned or urgent, and whether chemotherapy might come first.
How the operation is done is a separate decision
The same colectomy can be done through one longer cut, or through small keyhole cuts by hand or with a robotic system. That choice depends on your body, your earlier operations and the surgeon's experience. It does not change how much bowel is removed. If you want to know what happens in theatre and on the ward, the colectomy guide covers it step by step.
At CION, surgical oncologists plan the operation and it is carried out at an accredited partner hospital.Matching option to situation
Which operation fits which situation?
These are the four situations a surgeon sorts you into. Most people fall into the second.
Cancer found inside a removed polyp
If the cancer is shallow and the polyp came out whole with a clear edge, the colonoscopy may have been enough. If the edge is close or the cancer looks aggressive under the microscope, a colectomy is advised to check the nearby lymph nodes.
The pathology report decides this, not the colonoscopy picture.A planned colectomy
This is the usual route for cancer confined to the bowel or its nearby nodes. The segment removed depends on where the tumour sits, which our guide to which operation suits which part of the colon maps out.
The common names
- Right hemicolectomy
- Left hemicolectomy
- Sigmoid colectomy
- Extended or subtotal colectomy
A blocked or torn bowel
A tumour that blocks the colon may need emergency surgery, sometimes with a temporary stoma. In some people a metal stent opens the bowel first, so a planned operation can follow. Our page on stenting before surgery explains who that suits.
Cancer that has spread
When spread is limited to a few spots in the liver or lung, removing both the bowel tumour and those spots can sometimes be curable. The tumour board decides the order, and chemotherapy often comes first.
Not sure whether this applies to you?
Ask an oncologistBefore anyone operates
How is the surgical decision actually made?
The tumour is located and confirmed
A colonoscopy finds the tumour and takes a biopsy, a small sample checked under a microscope. The endoscopist may leave a small ink tattoo beside it so the surgeon can find it from outside the bowel. CION arranges the colonoscopy through a partner centre.
The scans show how far it has gone
A CT scan of the chest, abdomen and pelvis looks for spread to the liver, lungs and nodes. A CEA blood test, a marker some colon cancers release, gives a starting value to compare against later.
The tumour board agrees the plan
Surgeons, medical oncologists, radiologists and pathologists review your reports together. They agree whether surgery comes first, which operation fits, and whether chemotherapy is likely afterwards.
Your fitness is checked
Heart, lungs, kidneys, sugar control and nutrition all matter for a safe operation and recovery. Anaemia, a low haemoglobin, is often corrected first, sometimes with iron through a drip.
On your surgical plan
What do the words on the consent form mean?
- Colectomy
- Removing part or all of the colon. Hemicolectomy means roughly one side of it.
- Anastomosis
- The join made between the two healthy ends of bowel after the tumour segment is removed.
- Stoma
- An opening of the bowel on the tummy wall, with a bag over it. Most colon operations do not need one.
- Mesocolon
- The fatty sheet carrying the blood vessels and lymph nodes of the colon. It is removed with the tumour segment.
- Margin
- The healthy tissue at the cut edges. A clear margin means no cancer cells were seen there.
- Laparoscopic
- Keyhole surgery through small cuts using a camera. Robotic surgery is a form of it.
Leave a number, we will call you
One field. No form to fill in, and no charge for the call.
Commonly believed
What do families often get wrong about colon surgery?
"Bowel cancer surgery always means a bag for life."
Most colon cancer operations rejoin the bowel straight away and leave no stoma. A stoma is more likely in an emergency or for cancers low in the rectum, and many are temporary. Read more on whether you will need a stoma.
"Opening the body lets air spread the cancer."
Air does not spread cancer. People sometimes feel worse after surgery because the cancer was already more advanced than anyone knew. Delaying a planned operation out of this fear lets the tumour keep growing.
"Keyhole surgery removes less, so it is not as thorough."
In suitable patients, keyhole surgery removes the same segment and the same lymph nodes as open surgery. Recovery is often quicker. It is not suitable for everyone, and switching to open mid-way is a safety choice, not a failure.
"Once cancer has spread, surgery is pointless."
Not always. When spread to the liver or lungs is limited, removing it can sometimes be curable. Only some people are suitable, and the tumour board decides.
Being straight with you
What this page cannot tell you
It cannot tell you which operation is right for you. That depends on your colonoscopy report, your biopsy, your CT scan and your fitness, read together by a team. Two people with the same stage can be offered different operations for good reasons.
Who this page does not apply to
If your tumour is in the rectum, the last part of the bowel, the operations and the use of radiation are different. Our page on colon versus rectal cancer explains why. It also does not apply to anyone told they are not fit for a major operation. For them, other treatments are planned instead.
It cannot predict how your recovery will go
Hospital stay, return of bowel function and time off work vary with the operation, your age and other illnesses. The surgeon who has seen your scans can give you a realistic estimate.
If you have been told you need a colectomy and want the plan checked, a second opinion is a normal and reasonable request.Questions we are asked
Common questions about colon cancer surgery options
Is surgery always the first treatment for colon cancer?
Usually, for cancer that has not spread. But if the tumour has grown into nearby organs or has spread to the liver, chemotherapy may come first to shrink it. The tumour board decides the order after reviewing your scans and biopsy together.
Can colon cancer be removed without an operation?
Only when it is very early and found inside a polyp that was removed whole. Even then, the pathology report must show clear edges and no worrying features. If it does not, a colectomy is still advised to remove and check the nearby lymph nodes.
Will I need a stoma bag after colon surgery?
Most people having a planned colon operation do not. A stoma is more likely after emergency surgery for a blocked or torn bowel, or if the join is judged unsafe. Many stomas made in those situations are later reversed in a second, smaller operation.
Is keyhole surgery better than open surgery?
For suitable patients it removes the same amount of bowel and usually means less pain and a quicker recovery. Earlier operations, a very large tumour or an emergency may make open surgery the safer choice. Your surgeon should explain why one is advised.
How long will I be in hospital?
Most people stay several days after a planned colectomy. Keyhole surgery and enhanced recovery programmes, which get you eating and walking early, tend to shorten the stay. Emergency operations, older age and other illnesses tend to lengthen it.
Will I need chemotherapy after the operation?
It depends on the final stage, which comes from the pathology report on the removed bowel and lymph nodes. If cancer is found in the nodes, chemotherapy is usually recommended. For some cancers without node spread, other high-risk features in the report can tip the decision too.
Can an elderly parent have colon surgery?
Age alone does not rule it out. What matters is how fit your parent is, how well the heart, lungs and kidneys work, and what they want. Many older people recover well. For those who are frail, gentler options such as a stent are considered.
Where is the operation done if I am a CION patient?
CION's surgical oncologists plan the operation and it is carried out at an accredited partner hospital. Chemotherapy, follow-up and supportive care then continue at a CION centre. Call the helpline and we will explain how the referral works.
Your Specialists
Meet CION's colon cancer specialists. Bring your colonoscopy, scan or biopsy report.
Our surgical and medical oncologists plan colon cancer care together: which operation, whether chemotherapy is needed, and the follow-up that comes after.
Medical Oncologist
Dr. C. Raghavendra Reddy
MBBS(Gold Medal), DNB(General Medicine), DM(Medical Oncology)(Gold Medal)
Medical Oncologist
Dr. Bharati Devi Gorantla
MBBS, MD(General Medicine), DM(Medical Oncology)(Adyar,Chennai), ECMO, MRCP SCE(UK)
Medical Oncologist
Dr. Owais Mohammed
MBBS, MD (General Medicine), DrNB (Medical Oncology), ECMO, MRCP SCE (Medical Oncology) (UK)
Medical Oncologist
Medical Oncologist
Surgical Oncologist
Dr. Muralidhar Muddusetty
MBBS (AIIMS), MS (Surgery) (AIIMS), DNB (Surgical Oncology), MRCS (Edinburgh)
Surgical Oncologist
Want a specific doctor for your case? Mention them when booking.
Book Free ConsultationBook an appointment with our specialist
Share your name and number — we'll call you back within 30 minutes to schedule your consultation.
Sources
- American Cancer Society — Colon Cancer Surgery
- National Cancer Institute — Colon Cancer Treatment
- NHS — Treatment for bowel cancer
- Cancer Research UK — Treatment for bowel (colorectal) cancer
This page is general information, not a prescription. Do not change or stop any treatment based on what you read here. If anything is worrying you, contact your own treating team — or call our helpline and we will help you reach the right specialist.
Keep reading
Related pages
Which operation for which part of the colonHow the tumour's position decides what is removedOpen, laparoscopic or robotic for colon cancerChoosing how the operation is doneWill you need a stoma after colon cancer surgery?The question most families ask firstEndoscopic removal instead of surgery for early cancerWhen a colonoscopy alone may be enough
Talk to us
Want a surgeon to explain which operation fits your scans?
Share your colonoscopy, biopsy and CT reports and a CION surgical oncologist will review them with the tumour board. We will explain which operation fits, why, and what comes after. One helpline serves every CION centre.