Medical Oncologist
CION Cancer Clinics
Stent or surgery for a bowel blocked by cancer | CION Cancer Clinics
A colonic stent and surgery can both relieve a bowel blocked by cancer. A stent is placed through the back passage without a cut and usually means a shorter stay, but it suits mainly large-bowel blockages and can block again. Surgery reaches more places and tends to last longer, with a harder recovery. This page explains how the team weighs the two. 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
17+specialists on panel
15,000+patients treated
35+centres across Telangana & AP
4.8★ / 800+Google rating
On this page
The short answer
Is a stent or surgery used for a blocked bowel?
Both can relieve a bowel blocked by cancer, and neither suits everyone. A stent is a mesh tube placed inside the narrowed bowel without cutting the belly, while surgery makes a way around the blockage or brings the bowel out as a stoma. Which one is offered depends mostly on where the blockage is and how strong the patient is.
What a colonic stent is
A colonic stent is a flexible metal mesh tube. It is passed through the back passage on a thin camera, placed across the narrow part, and then opens out to hold the passage open. Stool can then pass through it in the normal way. The tumour stays in place.
What surgery means here
The operation is usually a bypass, which joins the bowel above the blockage to the bowel below it, or a stoma, which brings the bowel out onto the belly so stool empties into a bag. Occasionally the blocked section is removed. All of these need a general anaesthetic.
Why the choice matters to the family
A stent often means a shorter stay and no stoma bag. Surgery tends to last longer before the problem returns, but the recovery is harder. The treating team weighs these against each other for this one patient.
Side by side
How do a stent and surgery compare?
Colonic stent
Surgery
No cut on the belly; usually sedation rather than a full anaesthetic
A general anaesthetic and a cut, or keyhole surgery
Often a short hospital stay
Usually a longer stay and a slower recovery
No stoma bag
May involve a stoma, sometimes permanent
Can move, block again or, rarely, tear the bowel
Risks of the operation, the wound and the anaesthetic
Works mainly for blockages in the large bowel
Can deal with blockages a stent cannot reach
The procedure
What happens when a stent is placed?
Preparing
A CT scan shows exactly where the blockage is. Nothing is given by mouth, fluids go in through a drip, and blood tests check that it is safe to go ahead. Tell the team about every medicine, especially blood thinners.
Sedation
Most people are given medicine through a vein to make them relaxed and sleepy. A full general anaesthetic is not usually needed, which matters for someone who is very weak.
Placing the stent
A thin flexible camera goes in through the back passage. Using the camera and X-ray pictures, the doctor passes a fine wire through the narrow part and slides the stent over it. The stent then opens out.
Afterwards
Stool and wind often start to pass within a short time. Fluids come first, then soft food. You will be told what to eat to keep stool soft so that it moves easily through the stent.
Not sure whether this applies to you?
Ask an oncologistWeighing it up
What makes the team lean one way or the other?
These are the things the team weighs. None of them makes the decision on its own.
Where the blockage is
Stents work best in the left side of the large bowel and the lower colon. Blockages very low in the rectum, or in the small bowel, are usually harder or not possible to stent.
How many blockages there are
A stent opens one narrow place. If cancer has spread across the lining of the belly and blocked the bowel in several spots, neither a stent nor an operation may bring lasting relief.
How strong the patient is
For someone very frail, avoiding an anaesthetic and a wound can matter a great deal. For someone active with more treatment planned, the longer-lasting relief of surgery may matter more.
What treatment comes next
Some chemotherapy and targeted medicines can raise the chance of a stent causing a tear. Tell the team about planned treatment, because it can change which route they suggest.
Also worth asking
- Whether stenting is done at this centre
- Who to call if the stent blocks
Being straight with you
What can this comparison not tell you?
It cannot tell you which option is right for your family member. The team has seen the scan, examined the patient and knows the rest of the treatment plan. This page can only explain what they are weighing, so that you can follow the conversation and ask good questions.
Neither route treats the cancer
A stent and a palliative operation both relieve the blockage. Palliative here means aimed at easing symptoms. Neither removes the cancer, and the blockage can return with either one as the disease grows. Ask what the plan would be if that happens.
Sometimes the answer is neither
When the bowel is blocked in many places, or the patient is too unwell for any procedure, the team may suggest care with medicines and a draining tube instead. That can control pain and vomiting well. It is a medical judgement about what will help, and it is a fair thing to ask the palliative care team about.
Questions worth taking to the meeting
Ask where exactly the blockage is and whether a stent can reach it. Ask what recovery would look like with each route, and whether a stoma is likely. Ask what happens if the stent or the operation stops working. Write the answers down, because it is hard to remember them later.
Commonly believed
What do families often get wrong about stents?
"A stent is a small thing, so it has no risks."
It avoids a cut, but it is still a procedure. The stent can slip, block with stool or tumour, or occasionally cause a tear in the bowel. Any of these may then need an emergency operation.
"Surgery is always the stronger choice."
A bigger operation is not automatically a better one. For a frail patient, the recovery from surgery can take up much of the time and strength they have. The team matches the route to the person.
"Once the stent is in, he can eat anything."
Hard, stringy or very fibrous foods can get stuck in the mesh. Most people are asked to eat soft foods, chew well and take a stool softener if the doctor prescribes one.
"A stent means she will never need a stoma."
A stent can avoid a stoma for now. If it stops working, a stoma may still be needed later. Some people are given a stent first so they are stronger before a planned operation.
Did you know
A stent is sometimes used as a bridge. It relieves an emergency blockage so the patient can eat, recover strength and be properly assessed, and a planned operation follows later if the team thinks it will help.
Questions we are asked
Common questions about stenting and surgery
How long does a stent keep working?
It varies a great deal. Some stents keep the bowel open for the rest of the patient's life. Others block or move sooner, because the tumour grows through or around the mesh. Ask the doctor what is realistic in your situation and what signs would suggest it has stopped working.
What are the signs a stent has blocked?
The same signs as the first blockage: cramping belly pain, a swollen belly, vomiting, and no stool or wind passing. Bleeding from the back passage or sudden severe pain also needs attention. Go to the emergency department the same day and say the patient has a bowel stent.
Can a blocked stent be fixed?
Sometimes a second stent can be placed inside the first one. In other cases surgery or a stoma is the next step. Whether either is possible depends on the patient's strength at that point and where the blockage has formed.
Is a stent possible in the small bowel?
Usually not through the back passage, because the camera cannot reach most of the small bowel. Blockages near the stomach outlet can sometimes be stented from above. For most small bowel blockages, the options are surgery or care with medicines and a draining tube.
Will the stent hurt or be felt?
Most people cannot feel the stent once it is in. Some have mild belly discomfort, a feeling of needing to open the bowels or some bleeding in the first days. Tell the team about any pain that is getting worse rather than better.
Does surgery mean a permanent bag?
Not always. A bypass joins the bowel inside the belly and needs no bag. A stoma does need a bag, and in advanced cancer it is often permanent. Ask before the operation which is planned, and what might change the plan once the surgeon sees inside.
Can we ask for a stent instead of surgery?
You can always ask why a stent was not suggested. There is often a clear reason, such as where the blockage is. Hearing that reason helps you trust the plan. If you are still unsure, asking for a second opinion is reasonable when time allows.
Are these covered by Aarogyasri or insurance?
Both stenting and surgery for a cancer-related blockage are often covered. Aarogyasri, CGHS, ECHS, EHS and most cashless insurers may apply, depending on the procedure and the policy. Call the helpline with your card or policy details and we will check your cover.
Meet the Specialists
17+ senior cancer specialists. One panel for your case.
Trained at AIIMS, Tata Memorial, and leading international centres. Combined 150+ years of experience. Every complex case is reviewed by 3+ of them — together.
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
Surgical Oncologist
Surgical Oncologist
Dr. Vinay Mamidala
MBBS, MS(General Surgery), M.Ch(Surgical Oncology), FMAS, FARIS(Ongoing)
Surgical Oncologist
Radiation Oncologist
Radiation Oncologist
Radiation Oncologist
Hematologist
Surgical Oncologist
Dr. Vajja Sandeep Kumar
MBBS, MS (General Surgery), DrNB (Surgical Oncology), FALS Oncology
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
- Cancer Research UK — Bowel cancer
- Macmillan Cancer Support — Cancer information and support
- National Cancer Institute — Gastrointestinal complications (PDQ)
- NICE — Colorectal cancer guideline NG151
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
Surgery for Bowel Obstruction in Advanced CancerThe full picture of what can be done for a blockageDefunctioning Stoma to Relieve ObstructionWhat a stoma involves if surgery is chosenDeciding Whether to Operate Near the End of LifeWhen the question is whether to operate at allPalliative and Symptom-Control SurgeryThe full guide to operations that relieve symptoms
Talk to us
Unsure which route is being suggested, and why?
Tell us what has been found so far and we will help you reach a surgical oncologist who can explain the options. One helpline serves every CION centre.