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Emergency colectomy for a blocked or torn bowel | CION Cancer Clinics
An emergency colectomy removes part of the large bowel within hours because a tumour has blocked it completely or the bowel has torn. It is the same operation as a planned colectomy, done without the weeks of tests and preparation, which is why a stoma is more likely and the operation is usually open. This page explains what happens that night, what the surgeon is weighing, and what to ask before you agree. CION Cancer Clinics’ surgical oncologists in Hyderabad can talk this through with you.
MI
Medically reviewed by Dr. Mohammed ImaduddinConsultant Surgical Oncologist · MBBS, MS (General Surgery), MCh (Surgical Oncology) · last reviewed September 2026, next review due September 2027
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On this page
- What is an emergency colectomy?
- Why does a colon cancer become an emergency?
- Emergency and planned colectomy, compared
- What happens between arriving and the operation?
- Four things families tell us in the emergency ward
- Words you will hear that night, in plain language
- What this page cannot tell you
- Common questions about emergency colectomy
The short answer
What is an emergency colectomy?
An emergency colectomy is the same operation as a planned colectomy, removing part of the large bowel, but done within hours because the bowel has blocked completely or has torn. There is no time for the usual weeks of tests, fitness work and bowel preparation.
Why it cannot wait
A bowel that is completely blocked keeps stretching. The wall thins, the blood supply to it suffers, and eventually it can split. A bowel that has already torn spills its contents into the belly, and infection spreads fast. In both cases the safest course is to deal with it that day, and the surgeon will say so plainly.
How it differs from a planned operation
The surgeon is often operating without a full picture of the cancer, because the usual scans have not been possible. The bowel is swollen and full, which makes a safe join harder. Your body is dehydrated and may be fighting infection. Each of these pushes the surgeon towards the safer, simpler choice, which is often a stoma rather than a join.
Emergency surgery is not a sign of a worse cancer. It is a sign of where the tumour sat and how it presented, which is often a matter of chance.The situations
Why does a colon cancer become an emergency?
A minority of bowel cancers are first found this way, often in someone who had put up with a change in bowel habit for months.
Complete obstruction
The tumour grows around the inside of the bowel until nothing can pass. Cramping pain in waves, a swelling belly, vomiting, and no wind or motion.
Most often
- Left-sided and sigmoid tumours
- Where the bowel is narrowest
Perforation
The bowel wall tears, either at the tumour itself or further back where the blocked bowel has stretched thin. Sudden severe pain, a rigid belly and fever. This is the most urgent of all.
Bleeding that will not stop
Rarely a tumour bleeds heavily enough that the person becomes faint and the blood count falls fast. Most bleeding is slow and handled without emergency surgery, but not all of it.
Bowel losing its blood supply
A loop of bowel twists on itself, or is squeezed so hard by the block that its blood supply fails. Dead bowel has to be removed the same day, whatever else is found.
The scan usually shows which of these is happening. Ask the surgeon to tell you which one it was.Not sure whether this applies to you?
Ask an oncologistSide by side
Emergency and planned colectomy, compared
Planned colectomy
Emergency colectomy
Weeks of scans and staging before the operation
A single CT, often done that night
Fitness checks and prehabilitation first
Fluids, antibiotics and a tube through the nose, then theatre
Keyhole surgery is common
Open surgery is usual, because the bowel is swollen
A join is usually made and a stoma is the exception
A stoma is common, and is often temporary
Time to ask questions and prepare the family
The conversation happens in the hours before theatre
Ward bed afterwards, in most cases
ICU for the first day or two is more likely
Hour by hour
What happens between arriving and the operation?
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Arrival and first assessment
A surgeon examines the belly, blood is taken, and a drip goes in. Dehydration and pain are corrected before anything else. Nothing to eat or drink from this point.
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The scan
A CT of the belly shows where the block or tear is, how much bowel is affected, and whether there is anything else the surgeon needs to know before opening. It is read within the hour.
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The conversation and consent
The surgeon explains what they expect to find and what they may have to do, including a stoma. Ask everything now. Ask whether a stoma is likely, whether it would be temporary, and who will be in theatre.
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The operation
Under general anaesthetic, usually through a cut down the middle of the belly. The diseased length of bowel is removed. The surgeon then decides, on what they see, whether to join the ends or bring one out as a stoma.
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Recovery
Often a day or two in intensive care, then the ward. The pathology report on the removed bowel arrives during this time and sets out what comes next.
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Commonly believed
Four things families tell us in the emergency ward
"If we had come earlier, this would not have needed surgery."
Earlier diagnosis might have allowed a planned operation, but the cancer would still have needed removing. What matters now is the next decision, and you have a say in it.
"An emergency operation means the cancer is at the last stage."
A tumour blocks the bowel because of where it sits and how it grows, not only because of how far it has spread. Stage is set by the pathology report and the scans that follow, not by how the person arrived at hospital.
"A stoma made in an emergency is permanent."
Often it is not. A stoma made because the bowel was too swollen to join safely can be reversed once you have recovered and any further treatment is done. Whether that is possible depends on what was removed, and the surgeon will tell you.
"He is too weak. We should refuse and take him home."
A completely blocked or torn bowel does not settle at home. The choice is between operating now and a rapidly worsening situation. Ask the surgeon what they expect either way, and decide with that in front of you.
On the notes
Words you will hear that night, in plain language
- Hartmann's procedure
- The diseased bowel is removed, the far end is closed off and left inside, and the near end is brought out as a stoma. The commonest emergency choice for a left-sided block.
- Peritonitis
- Infection and inflammation of the lining of the belly, usually because the bowel has torn. Painful, dangerous and treated urgently.
- Primary anastomosis
- Joining the two ends of bowel in the same operation, without a stoma. Possible in some emergencies, not in others.
- Defunctioning stoma
- A stoma made upstream of a join to rest it while it heals. Usually temporary.
- Stent
- A small expandable tube placed inside the tumour through a colonoscope to open the block, sometimes used so that surgery can be planned rather than rushed.
Being straight with you
What this page cannot tell you
It cannot tell you whether your relative should have the operation tonight. That is a decision for the surgeon at the bedside with the scan in front of them and you in the room. What this page can do is tell you what they are weighing, so the conversation is one you can take part in.
What the surgeon is weighing
How complete the block is, whether the bowel has already torn, how well the heart and kidneys are coping, and whether a stent could turn an emergency into a planned operation. In a frail or very unwell person, the safest operation is the shortest one, which is often a stoma rather than a join. That is a choice made for safety, and it can often be revisited later.
What to ask before you sign
What do you expect to find? Is a stoma likely, and would it be temporary? Who will be operating? When will we know what comes next? Write the answers down, because you will not remember them in the morning.
Bring every previous report and medicine list to the hospital. In an emergency they save the team hours.Questions we are asked
Common questions about emergency colectomy
Will there definitely be a stoma?
Not always, but it is much more likely than in a planned operation. A swollen, full bowel and an unwell patient make a join risky, and the surgeon will often choose a stoma for safety. Many of these are temporary and can be reversed months later, once you have recovered and any further treatment is complete.
Can the cancer be removed properly in an emergency?
Usually, yes. The surgeon removes the diseased length of bowel with its lymph nodes (the small glands that drain it) in the same way as in a planned operation. What is different is the staging: the scans that would normally come first are done afterwards instead, and the plan is made once those results are in.
What is a stent and why was it mentioned?
A stent is a small expandable tube placed inside the tumour through a colonoscope to open the block. In some people it relieves the obstruction enough that the operation can be planned properly a few weeks later. It does not suit every tumour or every patient. Ask whether it is an option at your centre.
Why is the operation open and not keyhole?
Because a blocked bowel is swollen and heavy, and a torn one has spilled contents that need washing out. Both are difficult to manage safely through small cuts. A cut down the middle of the belly gives the surgeon a clear view and a quicker operation, which matters more than a smaller scar on that night.
Will he go to intensive care afterwards?
Often, for the first day or two. This is routine after a big emergency operation, especially in an older person or where there was infection. It means closer nursing and monitoring, not that something has gone wrong.
Does emergency surgery mean chemotherapy afterwards?
Not by itself. Whether chemotherapy is offered depends on the pathology report and the stage, which are known a week or two after the operation. A tumour that blocked or tore the bowel is one of the features the oncologist takes into account, but it is one of several, and the decision is discussed with you.
How long is recovery compared with a planned operation?
Longer, usually. The person was unwell going in, the operation was open, and there may be a stoma to learn. Expect a longer hospital stay and a slower return to eating and walking. The stoma nurse and dietitian become important early.
Is an emergency colectomy covered by Aarogyasri or insurance?
Emergency admissions are covered under Aarogyasri, CGHS, ECHS, EHS and most cashless insurance policies, and the approval is started while treatment begins rather than before. Bring the card and any previous reports. The hospital desk will tell you what is covered and what, if anything, falls outside.
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Sources
- Cancer Research UK — Surgery for bowel cancer
- National Cancer Institute — Colon cancer treatment (PDQ), patient version
- NICE — Colorectal cancer (NG151)
- NHS — Colostomy
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
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Talk to us
Facing an emergency operation tonight?
If you are in a hospital now, ask the surgeon the questions on this page. If you need a second pair of eyes on the plan afterwards, call the helpline. One helpline serves every CION centre.