Robotic nephrectomy with vena cava thrombectomy
Removal of a cancerous kidney together with the finger of tumor that has grown up its vein into the inferior vena cava, the body's largest vein, done robotically or through open surgery depending on how high the tumor reaches.
Also called IVC thrombectomy, Vena cava thrombectomy, Caval thrombectomy, Radical nephrectomy with IVC thrombectomy, Robotic IVC thrombectomy, Tumor thrombus surgery, Renal vein tumor thrombus, Kidney cancer in the vena cava
- Where
- Hospital operating room in a major center, with vascular, liver or heart surgeons available when needed
- Anesthesia
- General anesthesia, with extra monitoring lines and usually an ultrasound probe in the food pipe to watch the heart and vena cava
- Time in the room
- About 4 to 8 hours; longer when the tumor reaches the heart
- Hospital stay
- About 2 to 5 days after robotic surgery for lower levels; often 5 to 10 days or more after open surgery, starting in intensive care
- Going home with
- Bladder catheter for 1 to 3 days; sometimes a drain beside the kidney
- Back to normal
- About 4 to 8 weeks after robotic surgery; often 2 to 3 months after open surgery with heart bypass
- Back to work
- Desk work in about 3 to 6 weeks; physical jobs in about 2 to 3 months
Overview
Some kidney cancers grow into the kidney's main vein, the renal vein, and then continue up inside the inferior vena cava, the large vein that carries blood from the lower body back to the heart. This finger of tumor is called a tumor thrombus. It is attached at the kidney end and often floats freely inside the vein. It is different from an ordinary blood clot, although a blood clot can form around or below it. A small share of kidney cancers grow into a vein this way, and many of these people have no spread elsewhere and can be cured with surgery.
Surgeons describe how high the tumor reaches using levels, which guide the whole plan. Level 0 means the tumor is only in the kidney vein. Level I means it just pokes into the vena cava, within about 2 centimeters (less than an inch). Level II means it goes higher in the vena cava but stays below the veins that drain the liver. Level III means it reaches the liver veins but stays below the diaphragm, the breathing muscle. Level IV means it goes above the diaphragm, often into the right side of the heart.
For levels 0 to II, and at a few highly experienced centers level III, the operation can be done robotically, with the da Vinci robot controlled by your surgeon from a console. Higher levels usually need open surgery with a larger incision, help from a liver surgeon to roll the liver away from the vena cava, and for level IV, often a heart surgeon and cardiopulmonary bypass (the heart-lung machine that takes over pumping during surgery).
This is one of the largest operations in urology, and its risks are real: blood loss and transfusions are common, a stay in intensive care is common for higher levels, and serious complications and, rarely, death can happen, more often with higher levels. Without surgery, though, these tumors usually keep growing, can block the vein, and can break off and travel to the lungs, and medicines alone rarely remove the plug. After surgery, many people are offered a year of immunotherapy to lower the chance of the cancer coming back.
The parts of your body involved
Each kidney drains its blood through a renal vein into the inferior vena cava, which runs up the right side of the spine, behind the liver, through the diaphragm and into the right atrium of the heart. The aorta, the main artery, runs beside it. The right kidney vein is short, so right-sided tumors reach the vena cava more easily. The left kidney vein is long and crosses in front of the aorta. Just below the diaphragm, the liver's own veins empty into the vena cava. The higher a tumor plug reaches, the more of this anatomy the surgeon must control.
- Kidney and tumor
The kidney cancer itself, usually large by the time it has grown into the vein.
- Renal vein
The vein carrying blood out of the kidney. The tumor plug grows along it into the vena cava.
- Inferior vena cava
The body's largest vein, carrying blood from the legs, kidneys and belly back to the heart. The surgeon opens it to remove the plug and then sews it closed.
- Liver veins and liver
The liver sits directly on the upper vena cava, and its veins drain into it. Plugs at level III reach this area.
- Right atrium of the heart
The heart chamber the vena cava empties into. Level IV plugs reach here.
- Aorta and renal artery
The main artery and the kidney's artery. The kidney artery is tied off early in the operation.
Why it’s done
When kidney cancer has grown into the vena cava but not spread elsewhere, removing the kidney and the whole plug is the only treatment that offers a real chance of cure.
- To remove all the visible cancer
Many people with a tumor plug and no spread elsewhere are alive and free of cancer years after surgery.
- To prevent the plug breaking off
A piece of tumor can break off and travel to the lungs, which can be life-threatening. Removing it prevents this.
- To relieve a blocked vein
A large plug can slow blood return from the legs and liver, causing leg swelling, fluid in the belly or liver damage.
- To learn the exact stage
The pathology report shows the cancer type, grade and stage, which guides whether a year of immunotherapy is offered.
- As part of treatment for spread cancer
In selected people whose cancer has spread, removing the kidney and plug, together with medicines, may help. This decision is made case by case.
Other options
- Open surgery
The same operation through a larger incision under the ribs or down the middle of the belly. It is the standard approach for levels III and IV and is used for any level when robotic surgery is not suitable or available.
- Medicines first, then surgery
Immunotherapy or targeted medicines are sometimes given first, mainly in studies. They shrink the plug only modestly in most people and rarely lower its level enough to change the operation.
- Medicines alone
When cancer has spread widely, or surgery would be too risky, immunotherapy and targeted medicines are the main treatment. They can control cancer for a long time but rarely remove the plug.
- A clinical trial
Studies are testing treatments given before or after surgery. Ask whether one fits you.
- Comfort-focused care
For people who are too unwell for a major operation, care aimed at symptoms and quality of life, sometimes with radiation or medicines.
Getting ready
Tick items off as you go. Your checklist is saved on this device only.
Weeks before
The week before
The day before
The morning of surgery
In the operating room, step by step
Press play or pick a step. Each drawing shows what your surgeon is doing at that moment. Your team may do some steps differently.
1. Going to sleep, with extra monitoring
The anesthesia team puts you fully to sleep and places a breathing tube. After you are asleep, they place a thin line in an artery at the wrist to watch blood pressure beat by beat, a larger line in a neck vein, and an ultrasound probe down the food pipe that shows the heart and the top of the plug. A catheter goes into your bladder, and you are turned partly onto your side.
More detail
The ultrasound probe in the food pipe is called transesophageal echocardiography, or TEE. It lets the team see the top of the plug throughout surgery and spot early if any piece moves toward the heart.
The surgeon sits at a console a few steps from you and moves every instrument with hand controls and foot pedals. The robot cannot move on its own or make decisions.
A camera on one arm gives the surgeon a bright, three-dimensional picture magnified about ten times, which helps them see small nerves and vessels.
The instruments are about the width of a pencil and bend like a wrist inside your body, so the surgeon can stitch and dissect through small openings.
A bedside assistant and a scrub nurse stay at the table, and the anesthesia team watches your breathing and blood pressure throughout. Most U.S. hospitals use the da Vinci system made by Intuitive.
After the operation
In the hospital
- Intensive care or step-down unit
Many people spend the first night in intensive care or a step-down unit for close watching of blood pressure, bleeding and kidney function. After level III or IV surgery, the stay there is often several days.
- Tubes and lines
You may wake with the breathing tube already out, or it may stay a few hours. Expect the neck line, an arterial line, a bladder catheter and sometimes a drain, removed over the next days.
- Pain control
After robotic surgery, pain is usually managed with scheduled pills and IV medicine. After open surgery, an epidural (a thin tube in the back that numbs the belly) or nerve blocks are often used.
- Blood tests
Blood counts, kidney function and liver tests are checked daily. Transfusions are given if needed. A rise in creatinine, a kidney blood test, is expected because one kidney is now doing all the work.
- Walking and breathing
Nurses help you sit and walk from the first day or two. A breathing device helps keep your lungs open.
- Eating
You start with liquids and move to food as your bowels wake up, often within 1 to 3 days.
- Blood clot prevention
Blood thinner shots are usually given in the hospital, and many people continue them at home for several weeks.
At home
- Pain
Soreness at the cuts and deep in the side lasts 2 to 4 weeks after robotic surgery, longer after open surgery. Ask before taking ibuprofen or naproxen, which can strain your remaining kidney.
- Wounds and showering
Shower after 24 to 48 hours unless told otherwise. Avoid baths and swimming until the cuts are fully healed.
- Tiredness
Fatigue is the main complaint for weeks to months, especially after open surgery or heart bypass. Short walks several times a day help.
- Diet and fluids
Eat a normal, healthy diet with enough protein for healing, and drink enough to keep urine pale.
- Bowels
Use a stool softener while taking opioid pills and avoid straining.
- Activity and lifting
Avoid lifting more than about 10 to 15 pounds for about 6 weeks. After the breastbone is opened, limits are stricter and last about 6 to 8 weeks.
- Leg swelling
Some swelling in the legs can happen if blood flow in the vena cava is reduced. Raise your legs and tell your team if it is new or one-sided.
- Driving
Do not drive while taking opioid pills. Most people drive again in 2 to 4 weeks after robotic surgery, later after open surgery.
- Protecting your remaining kidney
Keep your blood pressure controlled, avoid anti-inflammatory pain pills unless your doctor approves, and tell every doctor you have one kidney.
- Work
Desk work in about 3 to 6 weeks after robotic surgery; physical jobs often take 2 to 3 months.
Recovery timeline
- Day 0Surgery day
Surgery takes about 4 to 8 hours, longer for higher levels. Many people spend the first night in intensive care.
- Days 1 to 3Up and moving
Lines and the catheter come out step by step. You walk and start eating.
- Days 2 to 10Going home
Most people go home within a few days after robotic surgery, and later after open surgery.
- Weeks 1 to 2Pathology results
Your surgeon reviews the cancer type, grade, stage, margins and any lymph nodes.
- Weeks 3 to 12Deciding on immunotherapy
Based on the pathology, your team may recommend a year of immunotherapy with pembrolizumab, which in trials is started within about 12 weeks of surgery.
- Weeks 4 to 12Recovering strength
Energy returns gradually. Most people are back to light routines by 6 weeks, longer after open or heart surgery.
- About 3 monthsFirst follow-up scan
A CT of the chest, belly and pelvis checks for any return of the cancer.
- Years 1 to 5 and beyondRegular checks
Scans every 3 to 6 months at first, then less often, along with kidney function tests.
What it feels like
People facing this operation often feel overwhelmed: a kidney cancer, a word like thrombus, and talk of the heart. The weeks before and after are hard, and many people find strength in understanding the plan step by step.
Hearing the word thrombus
Many people think it means a blood clot or that the cancer has already spread everywhere. Fear is natural.
What helpsAsk your surgeon to show you the scan and the level. A tumor plug does not by itself mean the cancer has spread elsewhere, and many people are cured.
The days before
Many tests and many specialists can make the plan feel huge. Some people feel numb, others cannot stop thinking about it.
What helpsKeep a notebook of who is on your team and what each test is for. Bring a family member to visits. Ask who to call with questions.
Waking in intensive care
Lines in your neck and wrist, monitors beeping, a sore throat, and grogginess. Some people feel confused for a day or two, especially older adults.
What helpsFamily can bring glasses, hearing aids and familiar things. Ask nurses to explain each tube. Confusion after major surgery usually clears.
The first walk
Standing up for the first time can feel impossible, and the belly pulls when you straighten.
What helpsSit on the edge of the bed first, hold a pillow against your belly, and let the nurse lead. Each walk gets easier.
The pathology results
Waiting to hear whether the cancer was all removed, and whether more treatment is needed, is hard.
What helpsAsk when and how you will get the results. Write down your questions about immunotherapy before the visit.
Weeks at home
Tiredness can last longer than expected, and some people feel low or impatient with slow progress.
What helpsSet small daily goals, such as one more walk. Accept help. Tell your team if low mood lasts more than a couple of weeks.
Follow-up scans
Worry often builds before each scan.
What helpsAsk for results to be shared soon after the scan. Over time, each clear scan usually makes the next one easier.
How well it works
Success means the kidney tumor and the whole plug are removed, you recover with your remaining kidney working well, and follow-up scans stay clear.
- Complete removal
The surgeon and pathologist confirm the plug was removed in full and the edges are clear.
- Stage and type
A tumor in the vena cava is staged at least as T3, which is called locally advanced. The pathology also reports the cell type and grade, which guide follow-up and treatment.
- Immunotherapy after surgery
In the KEYNOTE-564 trial, a year of pembrolizumab after surgery lowered the chance of kidney cancer returning and helped people live longer. Many people after this operation are candidates.
- Kidney function
Your creatinine rises somewhat because one kidney now does all the work. Most people stay off dialysis.
- Long-term outlook
In large series, about half or more of people whose cancer had not spread elsewhere are alive 5 years after surgery, and many of them are cancer-free.
Risks
Every operation has risks. These are the ones people ask about most, with honest odds where good numbers exist. Your surgeon’s own results matter more than averages.
Common
Blood loss can be large, especially for higher levels.
Expected for weeks after robotic surgery and for months after open surgery or bypass.
With one kidney, the creatinine rises. A temporary larger rise right after surgery is common.
Bloating and a slow return of appetite and bowel movements for a few days.
Because this is a major operation, a sizable share of people have at least one complication, most of them treatable.
Less common
Lung, wound and urine infections, treated with antibiotics.
Clots in the legs or lungs are more likely after cancer surgery on the vena cava. Blood thinner shots lower the risk.
Usually temporary.
If the vena cava is narrowed after repair, or removed, blood can return more slowly from the legs.
A leaking lymph channel can fill the belly with fat-rich fluid. It usually settles with a low-fat diet.
The bowel, liver, pancreas or spleen can be injured, and are usually repaired at once.
Rare
Needed occasionally, for bleeding or a plug higher than expected. The team is always ready to do this quickly.
A piece of the plug breaking off and traveling to the lungs during surgery. It is rare and can be fatal, which is why the team watches the plug with ultrasound and controls the vena cava above it.
Uncommon for lower levels and higher for plugs reaching the liver or heart, and for people with other serious illness. Ask your surgeon about your own risk.
Rare, and more likely when heart bypass is used.
Rare, more likely if the other kidney was already weak.
Call your care team or go to the emergency room if
- Fever of 101°F (38.3°C) or higher, or shaking chills.
- Chest pain, sudden shortness of breath, or coughing up blood (call 911).
- Feeling faint or dizzy, a racing heart, or new severe pain in the side or belly.
- Swelling, pain or warmth in one leg, or new swelling of both legs.
- Very little urine for 8 hours or more despite drinking.
- A swollen, tight belly, repeated vomiting, or no gas or bowel movement for 3 days.
- Redness spreading from a cut, pus, or a wound that opens.
- New confusion, weakness of one side of the body, or trouble speaking (call 911).
Questions to ask your surgeon
- What level is my tumor plug, and how sure are we from the scans?
- Will you do my operation robotically or open, and why?
- Which other surgeons will be on the team, and will heart bypass be needed?
- How many of these operations do you and your center do each year?
- Will I stay in intensive care, and for how long?
- What is my chance of needing a blood transfusion?
- How well does my other kidney work, and what is my chance of needing dialysis?
- Do you recommend blocking the kidney artery before surgery, or starting a blood thinner?
- Would medicines before surgery help in my case?
- Will I be a candidate for immunotherapy afterward?
- What will recovery look like, and when can I return to work?
Words you may hear
- Pneumoperitoneum
- The gas-filled belly that makes keyhole surgery possible. Carbon dioxide is pumped in through a thin needle or the first port until the belly wall lifts like a tent (usually at a pressure of 12 to 15 mmHg), giving the camera and instruments room to work. The gas is let out at the end, and the little that remains is absorbed and breathed out over a day or two; it can cause shoulder-tip ache in the meantime.
- Renal cell carcinoma
- The most common type of kidney cancer, starting in the kidney's filtering tissue.
- Tumor thrombus
- A finger of tumor growing inside a vein, attached at the kidney end.
- Inferior vena cava (IVC)
- The body's largest vein, carrying blood from the lower body to the heart.
- Renal vein
- The vein that carries blood out of the kidney into the vena cava.
- Thrombus level
- A 0 to IV scale describing how high the tumor plug reaches, from the kidney vein to the heart.
- Cavotomy
- An opening made in the vena cava to remove the plug, then sewn closed.
- Hepatic veins
- The liver's veins, which empty into the vena cava just below the diaphragm.
- Right atrium
- The heart chamber that receives blood from the vena cava.
- Cardiopulmonary bypass
- The heart-lung machine that takes over pumping and breathing during heart surgery.
- TEE
- Transesophageal echocardiography: an ultrasound probe in the food pipe that shows the heart and vena cava during surgery.
- Embolization
- Blocking a blood vessel from the inside with a thin catheter passed through an artery.
- Cytoreductive nephrectomy
- Removing the kidney tumor when cancer has spread, as part of a treatment plan with medicines.
- Adjuvant immunotherapy
- Immune-boosting treatment given after surgery to lower the chance of the cancer returning.
- Tumor embolism
- A piece of tumor breaking off and traveling through the bloodstream, usually to the lungs.
Common questions
Is the plug a blood clot?
No. It is cancer tissue growing inside the vein. A blood clot can form around or below it, which is one reason some people receive blood thinners.
Does growing into the vein mean the cancer has spread?
Not by itself. Many people with a tumor plug have no spread elsewhere and can be cured with surgery. Scans of the chest and other areas check for spread before surgery.
Can this be done robotically?
For plugs in the kidney vein and lower vena cava (levels 0 to II), experienced centers often do it robotically. Higher levels usually need open surgery.
Will I need heart surgery?
Only if the plug reaches above the diaphragm into or near the heart (level IV), and sometimes for high level III plugs. Your scans and team will tell you.
Can I live normally with one kidney?
Most people do. Your remaining kidney takes over. Protect it by controlling blood pressure and avoiding anti-inflammatory pain pills unless your doctor approves.
Will I need treatment after surgery?
Many people are offered a year of immunotherapy with pembrolizumab, which lowered the chance of the cancer returning in a large trial. Your team will discuss it once the pathology is back.
How long is recovery?
About 4 to 8 weeks after robotic surgery for lower levels. After open surgery, especially with heart bypass, full recovery often takes 2 to 3 months or more.
Sources this page draws on
- American Urological Association, Renal Mass and Localized Renal Cancer: Evaluation, Management, and Follow-up: AUA Guideline (2021)
- European Association of Urology, EAU Guidelines on Renal Cell Carcinoma
- British Journal of Urology, Surgical treatment of renal cancer with vena cava extension (Neves and Zincke, Mayo Clinic thrombus level classification) (1987)
- New England Journal of Medicine, KEYNOTE-564: Adjuvant pembrolizumab after nephrectomy in renal-cell carcinoma (2021)
- American Cancer Society, Surgery for Kidney Cancer
Written November 2026. This page explains what usually happens. It is not medical advice and does not replace a conversation with your own surgeon, whose plan for you comes first.