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CION Cancer Clinics
Nephrectomy with tumour thrombus in the vein | CION Cancer Clinics
A tumour thrombus means the kidney cancer has grown as a solid plug along the kidney's vein, sometimes reaching the large vein that returns blood to the heart. The operation removes the kidney and the plug together, in one piece, through an open cut, often with a liver or heart surgeon in the room. This page explains the levels on your report, what happens in theatre and what the team weighs before offering it. CION Cancer Clinics’ surgical oncologists in Hyderabad can talk this through with you.
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Medically reviewed by Dr. Muralidhar MuddusettyConsultant Surgical Oncologist · MBBS (AIIMS), MS (Surgery, AIIMS), DNB (Surgical Oncology), MRCS (Edinburgh) · last reviewed September 2026, next review due September 2027
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On this page
- What does "tumour thrombus in the vein" mean for the operation?
- What the "level" of the thrombus means
- Four ways this operation is bigger than a standard nephrectomy
- What happens once you are asleep
- What can go wrong, and what this page cannot tell you
- Four things families say when they hear "thrombus"
- Common questions about nephrectomy with tumour thrombus
The short answer
What does "tumour thrombus in the vein" mean for the operation?
A tumour thrombus means the kidney cancer has grown as a solid plug along the kidney's vein and sometimes into the large vein that carries blood back to the heart. The operation removes the kidney and that plug together, in one piece. It is a bigger operation than a standard nephrectomy, and it is planned by more than one specialist.
It is not a blood clot
The word thrombus usually means a clot. Here it means living tumour that has grown into the vein like a root. Blood thinners will not dissolve it, and it cannot be left in place, because it can block the vein or break off and travel to the lungs. That is why surgery is usually the recommended path when it is possible.
Who this operation may not suit
It asks a lot of the heart, lungs and kidneys. Someone who is very frail, or whose cancer has spread widely to other organs, may be advised that the operation would cost more than it gives. That judgement is made by the team with you, not by a scan alone.
This page cannot tell you whether you should have the operation. It tells you what the team weighs and what to ask.On your scan report
What the "level" of the thrombus means
- Renal vein only
- The plug stays in the kidney's own vein and has not reached the large vein. Often written as level 0. The operation is closest to a standard nephrectomy.
- Level I
- The plug has just entered the large vein, the inferior vena cava, near where the kidney vein joins it. It can usually be controlled with a clamp close to the kidney.
- Level II
- The plug reaches further up the vena cava, but stays below the veins that drain the liver. The vein must be clamped above and below it.
- Level III
- The plug sits behind the liver, at or above the liver veins. The liver often has to be lifted to reach it, and a liver surgeon may join the team.
- Level IV
- The plug has passed the diaphragm and may reach into the heart. A heart surgeon is part of the operation, and a heart-lung bypass machine may be used.
Not sure whether this applies to you?
Ask an oncologistHow it differs
Four ways this operation is bigger than a standard nephrectomy
The kidney still comes out the same way. Everything around the vein is what changes.
Almost always an open cut
The surgeon needs both hands on the vena cava, so keyhole surgery is rarely suitable. Expect a long cut across the upper abdomen, and for the highest levels, one that continues up the chest.
More than one team
The urological or surgical oncologist leads. Depending on the level, a liver surgeon, a vascular surgeon or a heart surgeon may scrub in for their part. Ask who will be in the room.
Worth asking
- How often does this centre do this operation?
- Is a heart team available on the day if needed?
Blood ready in larger amounts
Opening the largest vein in the body means blood loss can be heavy. Several units are cross-matched beforehand, and a transfusion during the operation is more likely than in a standard nephrectomy.
ICU afterwards, planned
You will wake in intensive care rather than a ward. This is planned, not a sign of trouble. The heart, kidneys and breathing are watched closely for the first day or two.
Higher levels usually mean a longer ICU stay. Ask your team what they expect for you.Inside the operation
What happens once you are asleep
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Extra lines and monitoring
The anaesthetist places a line in an artery and a large drip in the neck before the cut. Sometimes an ultrasound probe is passed down the food pipe to watch the heart and the top of the thrombus.
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Freeing the kidney
The kidney is freed from its surroundings and its artery is sealed first, so no more blood flows into the tumour. The vein is left for now.
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Controlling the vena cava
The large vein is gently freed and clamped above and below the plug, and the vein from the other kidney is clamped too. This is the stage where a liver or heart surgeon does their part.
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Opening the vein and lifting out the plug
The vein is opened, the tumour plug is drawn out in one piece with the kidney, and the inside of the vein is checked. It is then stitched closed, or a small patch is used if the wall was involved.
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Releasing the clamps and closing
Blood flow is restored in a careful order. The surgeon checks for bleeding, leaves a drain, and closes. You go to ICU with the breathing tube sometimes still in place for a few hours.
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Being straight with you
What can go wrong, and what this page cannot tell you
The two risks the team plans hardest around are heavy bleeding and a piece of the plug breaking off before it is controlled. Both are why the vein is clamped above the tumour before it is touched. The chance of a serious complication rises with the level of the thrombus, and your surgeon should give you their own figures rather than a national average.
Risks specific to the vein
Clamping the vena cava briefly lowers the blood returning to the heart, so blood pressure can drop while it is closed. The anaesthetist manages this minute by minute. Afterwards, the legs can swell for a time while the vein settles, and a blood thinner injection is commonly given on the ward to stop new clots forming. Your team sets when it starts and stops.
What only the pathology report can say
The operation removes what can be seen and felt. Whether the vein wall itself was invaded, and whether any lymph nodes held cancer, comes from the laboratory some days later. That report, not the operation, shapes what treatment is discussed next.
No page can tell you how you personally will do after this operation. Ask your surgeon that question directly, and take someone with you to hear the answer.Commonly believed
Four things families say when they hear "thrombus"
"It is in the vein, so it has spread and surgery is pointless."
Growth into the vein is not the same as spread to other organs. The plug is still attached to the main tumour and comes out with it. Scans of the chest and bones are what tell the team whether it has spread elsewhere.
"Blood thinners can shrink it first."
They cannot, because it is tumour tissue rather than clot. Blood thinners may still be used to stop an ordinary clot forming on top of it, which is a different job.
"The plug can be pulled out through a small cut."
Handling the plug without controlling the vein first risks a piece breaking loose and travelling to the lungs. The long open cut exists so the surgeon can clamp above it before anything is moved.
"Only a hospital abroad can do this."
Several Indian centres perform this operation regularly, including at the highest levels with a heart team. What matters is asking any centre how often they do it and who will be in the room on the day.
Questions we are asked
Common questions about nephrectomy with tumour thrombus
How long does this operation take?
Longer than a standard nephrectomy, and longer still for the higher levels, because the vein has to be freed and controlled before the plug is touched. If a heart team and bypass are involved, the family should expect most of a day.
Will my heart be stopped during the operation?
Only for a level IV thrombus that reaches the heart, and even then not always. Some teams reach the top of the plug through the diaphragm without bypass. Where bypass is used, a heart surgeon and perfusionist run it, exactly as in heart surgery.
Can it be done by keyhole or robot?
Rarely, and usually only when the plug is confined to the kidney vein or just entering the vena cava. For anything higher, an open cut is the safer route because the surgeon needs direct control of the large vein.
Why do I need a heart scan before a kidney operation?
The team needs to know exactly how far up the plug reaches, and whether the heart is strong enough for a long operation with big shifts in blood pressure. An echo, and often a detailed MRI or CT of the vein, are standard before this surgery.
How long will I be in ICU?
It depends on the level and on how the operation went. A day or two is common for the lower levels; higher levels, and anyone who needed bypass, stay longer. The move to a ward happens once breathing, blood pressure and kidney function are stable.
Will the other kidney cope?
Its vein is clamped briefly during the operation, and its function is checked closely afterwards. Most people's remaining kidney recovers, but it can be sluggish for some days. Your team tests it before surgery, and that result feeds into the decision to operate at all.
Will I need more treatment after the operation?
Possibly. The pathology report and follow-up scans decide that, and it is discussed at a tumour board with medical oncologists present. Some people are offered tablets or immunotherapy afterwards; some are watched with scans. The operation itself does not settle this question.
Is this operation covered by Aarogyasri or insurance?
Kidney cancer surgery is usually within the scope of Aarogyasri, CGHS, ECHS, EHS and most cashless insurers, but the extra teams, ICU days and blood can change the approval needed. Call the helpline with your card details and we will check what applies to your own cover before you travel.
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Dr. Owais Mohammed
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Dr. Muralidhar Muddusetty
MBBS (AIIMS), MS (Surgery) (AIIMS), DNB (Surgical Oncology), MRCS (Edinburgh)
Surgical Oncologist
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Dr. Vinay Mamidala
MBBS, MS(General Surgery), M.Ch(Surgical Oncology), FMAS, FARIS(Ongoing)
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Dr. Vajja Sandeep Kumar
MBBS, MS (General Surgery), DrNB (Surgical Oncology), FALS Oncology
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Sources
- Cancer Research UK — Surgery for kidney cancer
- American Cancer Society — Surgery for Kidney Cancer
- National Cancer Institute — Renal Cell Cancer Treatment (PDQ) - Patient Version
- NHS — Kidney 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
What Happens in Theatre During a NephrectomyThe standard operation this one builds onBleeding Risk During Kidney SurgeryWhy blood is cross-matched and when transfusion is usedLymph Node Dissection During NephrectomyNodes are often removed in the same operationICU and the First Days After SurgeryWhat the planned ICU stay looks likeChoosing a Surgeon and a CentreWhat to ask a centre about an operation this size
Talk to us
Told the tumour has grown into the vein?
Send us the CT or MRI report or call the helpline. We will help you reach a surgical team that does this operation regularly and can tell you what it would involve for you. One helpline serves every CION centre.