Medical Oncologist
CION Cancer Clinics
Stents in cancer care: what they do | CION Cancer Clinics
A stent is a small tube that holds open a passage a cancer has narrowed or blocked. It does not treat the cancer itself. It lets food, air, bile, urine or stool pass again, which can ease symptoms quickly and make other treatment possible. This page explains where stents are used, how they are placed, and what they cannot do. 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
- What does a stent actually do when cancer blocks a tube?
- Which parts of the body can a stent be placed in?
- How is a stent usually put in?
- How is a stent different from an operation to bypass the blockage?
- What do the words on the procedure note mean?
- What do families often get wrong about stents?
- Who is a stent not right for, and what can this page not tell you?
- Common questions about stents in cancer care
The short answer
What does a stent actually do when cancer blocks a tube?
A stent is a small hollow tube, usually a mesh of metal or a plastic tube, that holds a narrowed passage open from the inside. It does not remove or shrink the cancer. It gives food, air, bile, urine or stool a way past the blockage again.
Why a blockage matters so much
The body is full of tubes. The food pipe, the windpipe, the bile duct, the tubes from the kidneys and the large bowel all carry something that has to keep moving. A tumour growing inside or pressing from outside can squeeze one of them shut. When that happens, the problem is often more urgent than the cancer itself. You cannot swallow, you cannot breathe easily, your skin turns yellow, or your belly swells because nothing is passing.
What a stent can give you
Relief of that blockage, often within a day or two. For many people it means eating again, breathing more easily or going home from hospital sooner. It can also buy time, so that chemotherapy, radiotherapy or a planned operation can go ahead in better shape.
A stent treats the blockage, not the disease. Your cancer treatment plan is a separate conversation with your team.Where they are used
Which parts of the body can a stent be placed in?
The idea is the same everywhere. The route in, the material and the team doing it change with the organ.
Food pipe
For cancer of the food pipe or the top of the stomach that makes swallowing hard. It is placed through the mouth with a camera, under sedation.
Windpipe and main airways
For a tumour narrowing the windpipe or a main breathing tube. It is placed with a camera passed through the mouth, usually under general anaesthesia.
Bile duct
For jaundice caused by cancer of the pancreas, bile duct or nearby lymph nodes. Placed through the mouth with a camera, or through the skin over the liver.
Large bowel
For a bowel cancer that has blocked the passage of stool. It can sometimes avoid an emergency operation and a bag on the tummy.
Ureter
The thin tube from each kidney to the bladder. A DJ stent keeps urine draining when a pelvic tumour presses on it.
Large vein in the chest
For swelling of the face and arms when a tumour squeezes the main vein returning blood to the heart.
Not sure whether this applies to you?
Ask an oncologistOn the day
How is a stent usually put in?
Scans and a plan
A CT scan or camera test shows exactly where the narrowing is and how long it is. That decides the length and type of stent. Bring every report you have, including older ones.
Preparation
You are usually asked not to eat for some hours before. Tell the team about every medicine, especially blood thinners and diabetes tablets. They will tell you what to do with each one.
The procedure
Most stents go in through a natural opening with a flexible camera and X-ray guidance. There is usually no cut. The stent goes in folded and opens itself once it sits across the blockage.
Checking it works
An X-ray or a simple test the next day confirms the stent has opened and is in the right place. Many people go home within a day or two, depending on why they came in.
Side by side
How is a stent different from an operation to bypass the blockage?
A stent
A bypass or diversion operation
Usually no cut, placed through a natural opening
A cut in the skin under general anaesthesia
Often a short hospital stay
A longer stay and a longer recovery
Can block or move and may need a repeat procedure
Tends to last longer once healed
Often chosen when fitness for surgery is limited
Considered when the body can cope with an operation
Leave a number, we will call you
One field. No form to fill in, and no charge for the call.
On your report
What do the words on the procedure note mean?
- Stricture
- A narrowed section of a tube. It can be caused by the tumour itself or by scarring after treatment.
- Self-expanding metal stent (SEMS)
- A mesh tube that goes in folded and springs open inside the body. The most common type for cancer blockages.
- Covered or uncovered
- A covered stent has a thin lining over the mesh, which keeps tumour from growing through the gaps but makes it slightly more likely to slip.
- Palliative
- Aimed at relieving symptoms and improving daily life, rather than removing the cancer.
- Patent
- Open and working. A "patent stent" is one that is letting things through as intended.
Commonly believed
What do families often get wrong about stents?
"If the doctor is offering a stent, nothing else can be done."
Not true. A stent is often placed so that other treatment can happen. Someone who cannot swallow or has deep jaundice may not be well enough for chemotherapy until the blockage is relieved. Ask the team plainly what the plan is after the stent.
"A stent is a permanent fix."
Some stents stay for the rest of a person's life without trouble. Others block with tumour, food or sludge, or slip out of place, and need to be cleared, changed or added to. It helps to know the warning signs from the start.
"The stent will make the cancer spread."
The stent holds a passage open. It does not feed the tumour or carry cancer cells elsewhere. Waiting too long with a blocked tube, on the other hand, can leave a person weak, dehydrated or with an infection.
"Once it is in, you can eat and live exactly as before."
Life often gets much easier, but most stents come with some care. A food pipe stent needs softer food and plenty of fluid. A ureteric stent needs changing on a schedule. Your team will explain the rules for yours.
Being straight with you
Who is a stent not right for, and what can this page not tell you?
A stent is not suitable for every blockage. It needs a single narrowed section that a tube can bridge. If the bowel or bile duct is blocked in several places, a stent across one of them will not help much.
When the team may suggest something else
If the tumour sits very close to a valve or a junction, such as the top of the food pipe near the voice box, a stent can be uncomfortable or unsafe. If an operation to remove the cancer is planned soon, the team may prefer a feeding tube or a drain, so the stent does not make that operation harder. For some people a short course of radiotherapy relieves the narrowing instead.
What only your team can answer
This page cannot tell you whether a stent is right for you, how long it will work, or what it means for the course of the illness. Those depend on the cancer, where it sits, your fitness and your other treatment. Ask the team why a stent is being suggested, what the alternatives are, and what happens if it blocks.
Write your questions down before the appointment, and bring the family member who helps with decisions.Questions we are asked
Common questions about stents in cancer care
Does putting in a stent hurt?
Most stents are placed under sedation or general anaesthesia, so you do not feel the procedure. Afterwards there can be an ache or pressure as the stent opens fully, often for a few days. In the food pipe it may feel like something is stuck. Tell the team, because pain relief usually settles it.
How long does a stent last?
It varies widely. Metal stents placed for cancer often work for many months, and some are never changed. Plastic stents and ureteric stents are usually swapped on a planned schedule. Tumour growth, sludge or food can block any stent earlier, so your team will tell you the signs to watch.
Can a stent be taken out later?
Plastic stents and some covered metal stents can be removed or changed. Uncovered metal stents grow into the wall of the tube and are usually meant to stay. Ask which type you have and whether removal is part of the plan, so there are no surprises later.
Will I still need chemotherapy or radiotherapy?
Very often, yes. The stent only deals with the blockage. Treatment for the cancer itself is decided separately by your oncologists, based on the type and stage of the cancer and how well you are. Some people start treatment soon after a stent. Others are not offered it, and the team should explain why.
Can I have an MRI scan with a metal stent?
Most modern stents are safe in an MRI scanner, but not every one. Keep the stent card or the procedure note that names the make and type. Show it to the scan centre before any MRI, so they can check it against their safety list.
What signs mean the stent may have stopped working?
Usually the old problem coming back. Swallowing getting harder, breathlessness returning, yellow eyes or skin, a swollen belly with no stool or wind, or fever with shivering. Any of these needs a call to your team the same day. Severe breathlessness or repeated vomiting needs an emergency department.
Who actually places the stent?
It depends on the organ. A gastroenterologist often places food pipe, bile duct and bowel stents. A lung specialist handles the airway. A urologist places ureteric stents, and an interventional radiologist places many others through the skin. Your surgical oncologist usually coordinates the decision.
Is a stent covered by Aarogyasri or insurance?
Often, when it is part of approved cancer care. Aarogyasri, CGHS, ECHS, EHS and most cashless insurance policies may cover the procedure and the stent itself. Cover differs by plan, so call the helpline with your card details and we will check what applies to you before you travel.
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 — Stents for oesophageal cancer
- Macmillan Cancer Support — Stents
- National Cancer Institute — Definition of stent
- NHS — Oesophageal cancer: treatment
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
Oesophageal Stent for Swallowing ProblemsThe most common stent for cancer, explained in detailStent Blockage and MigrationWhat to do if a stent stops workingColonic Stent for Bowel ObstructionWhen a bowel stent can avoid an emergency operationStenting and Drainage ProceduresEvery stent and drain page in one place
Talk to us
Told you may need a stent?
Tell us what the scans have shown so far. We will help you reach the right specialist to talk through the options. One helpline serves every CION centre.