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Percutaneous drainage of an abscess or collection after surgery | CION Cancer Clinics
Percutaneous drainage empties a pocket of pus or fluid through the skin, using a thin tube guided by a CT or ultrasound scan. After cancer surgery it is often used for an abscess or collection in the belly or pelvis, and in many people it avoids a second operation. This page explains why collections form, how the drain is placed, what to expect, and which signs need same-day care. 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 percutaneous drainage after surgery?
- What kinds of collection can form after surgery?
- What happens from the scan to the drain coming out?
- When is a drain used, and when is another operation needed?
- What should you expect while the drain is in?
- What do families often fear about a drain after surgery?
- Common questions about percutaneous drainage
The short answer
What is percutaneous drainage after surgery?
It is a way of draining a pocket of pus or fluid through the skin, using a thin tube guided by a scan. It is often done after cancer surgery when a collection forms inside the belly or pelvis. In many people it avoids the need for a second operation.
Why a collection forms
After a large operation, fluid, blood or lymph can gather in the space where tissue was removed. If bacteria settle in it, it becomes an abscess, a closed pocket of pus. Sometimes a join made during surgery leaks a little, and fluid collects beside it. These are known complications of major surgery. They do not by themselves mean something was done wrongly.
How it is usually found
The first signs are often a fever that keeps returning, pain that gets worse instead of better, a swollen belly, poor appetite, or blood tests showing infection. A CT or ultrasound scan then shows the collection, how big it is and whether a needle can safely reach it.
Who does it
An interventional radiologist, a doctor who does procedures using scans, usually places the drain. Your surgeon stays in charge of your care and decides with them.
Small collections sometimes settle with antibiotics alone, without any drain.What is being drained
What kinds of collection can form after surgery?
The scan report will often name one of these. The name tells the team what the fluid is likely to be.
Abscess
A pocket of pus from infection. It usually causes fever and pain, and it needs draining plus antibiotics.
Leak from a join
Fluid from the bowel, stomach or pancreas seeping from where two parts were joined. Some small leaks heal with a drain alone.
A larger leak may need another operation.Bile collection
Bile gathering after liver, gallbladder or bile duct surgery. It may be called a biloma on the report.
Lymph collection
Clear fluid that gathers where lymph nodes were removed, often in the pelvis. It may be called a lymphocele.
Often seen after
- Gynaecological cancer surgery
- Prostate or bladder surgery
Old blood
A haematoma, a collection of blood. Many are left to settle, and drained only if they become infected or large.
Not sure whether this applies to you?
Ask an oncologistThe pathway
What happens from the scan to the drain coming out?
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The decision
Your surgeon and the radiologist look at the scan together. They weigh the size of the collection, whether a safe path exists for the needle, and how unwell you are.
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Preparing
A blood test checks clotting. If you are on a blood thinner, your doctors decide what happens to it. Do not stop it yourself. You may be asked not to eat for a few hours.
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The procedure
You lie on the CT or ultrasound table. The skin is numbed, and sedation may be given. A needle is guided into the pocket, and a thin tube is passed over a wire and left in place.
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Draining and antibiotics
The tube drains into a bag. A sample is sent to find which bacteria are present, so antibiotics can be matched. Nurses may flush the tube to keep it clear.
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Checking progress
Fever and pain usually settle as the pocket empties. A repeat scan may check that it has closed.
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Removal
Once the drain output falls and you are well, the tube is pulled out on the ward. It takes seconds and leaves a small hole that heals on its own.
Side by side
When is a drain used, and when is another operation needed?
A drain through the skin
A return to theatre
A single pocket a needle can safely reach
Several pockets, or none a needle can reach
A small leak that may seal on its own
A large leak spreading through the belly
Unwell but stable
Very unwell, with blood pressure falling
Local numbing, often with sedation
A general anaesthetic
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While it is in
What should you expect while the drain is in?
You can usually move around, sit out and walk with the bag. The tube is stitched or taped to the skin, and the site may ache. Pin the bag to your clothes below the drain so it does not pull.
Watching the output
Nurses note how much fluid comes out and what it looks like. Families can help by mentioning any change they see. Pus becoming thinner and lighter is usually a good sign. Fresh blood, a sudden jump in volume, or fluid that looks like bowel content should be reported straight away.
Going home with a drain
Some people go home with the tube still in. You will be shown how to empty the bag, keep the site dry, and flush the tube if needed. Ask for a written sheet and a number to call. Bathing is usually by sponge or a careful shower with the site covered.
What the page cannot tell you
How long your drain stays in, and whether it will be enough on its own, depends on the type of collection and how you respond. Some people need the tube repositioned or a second drain.
Commonly believed
What do families often fear about a drain after surgery?
"An abscess means the operation failed."
Collections are a known risk after large operations, even when the surgery went as planned. Finding and draining one early is part of normal careful recovery. It says nothing about whether the cancer was removed.
"Once antibiotics start, the drain is not needed."
Antibiotics struggle to reach the inside of a large pocket of pus. Small collections may settle on medicine alone, but larger ones usually need draining as well.
"The drain will spread the infection through the skin."
The tube gives the pus a controlled way out. Keeping the site clean and the bag below the drain is what matters.
"Chemotherapy after surgery will now be cancelled."
It may be delayed until the infection has cleared, so your body can cope. Your oncologist will set a new start date once you have recovered.
!
Signs that need care the same day
If you are at home with a drain, get help today for a fever with shivering, worsening belly pain, fresh bleeding from the tube or site, the tube falling out, or confusion and extreme drowsiness. These can mean the collection has come back or the infection is spreading. Go to the nearest emergency department, say you had cancer surgery and have a drain, and take your discharge papers.
Questions we are asked
Common questions about percutaneous drainage
Will I be awake for the drain to be put in?
Usually, yes. The skin is numbed with local anaesthetic, and many centres also give sedation through a drip to help you relax. You may feel pressure and some discomfort as the tube goes in. A general anaesthetic is rarely needed, though it may be used for children or very anxious adults.
How long will the drain stay in?
It varies. A simple abscess may drain within days. A collection linked to a leak can take much longer to dry up. The team removes the tube when the output has fallen, the fever has settled and, where needed, a scan shows the pocket has closed.
What are the risks of the procedure?
The main risks are bleeding, the tube injuring a nearby organ, infection spreading briefly into the blood, and the tube slipping or blocking. Using a scan to guide the needle lowers these risks. Your doctor will explain how they apply to you before you agree to the procedure.
Can the abscess come back after the drain is removed?
Sometimes. If the source, such as a small leak, has not fully healed, fluid can collect again. Watch for fever, pain or swelling returning in the weeks after removal, and tell your surgical team. A repeat scan will show whether another drain is needed.
Does the drain hurt while it is in?
The site often aches, especially when you move or cough, and a pulled tube hurts. Regular pain relief prescribed by your team usually keeps it manageable. Tell the nurses if pain is getting worse, because that can be a sign the tube has moved.
Can I eat normally with a drain in?
That depends on the collection. If it is linked to a leak from the bowel or pancreas, the surgeon may limit food or suggest special feeds for a time. Otherwise, eating well helps healing. Follow the plan your surgical team and dietitian give you.
What should my family watch for at home?
Watch the temperature, the colour and amount of fluid in the bag, and the skin around the tube. Redness spreading outwards, pus leaking around the tube, or a sudden stop in output should be reported. Keep a simple daily note of output to show at clinic.
Is the drain covered by Aarogyasri or insurance?
A drain placed for a complication of cancer surgery is often covered. Aarogyasri, CGHS, ECHS and EHS are accepted, and most cashless insurers are empanelled. Rules about extended stays vary by scheme and policy. Call the helpline with your card details and we will check your cover.
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Sources
- NHS — Abscess
- National Cancer Institute — Definition of abscess
- NHS — Sepsis
- American Cancer Society — Cancer surgery
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.
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