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Lymph node dissection during prostatectomy, explained plainly | CION Cancer Clinics
A pelvic lymph node dissection removes the small glands near the prostate during the same operation, so the laboratory can check whether cancer has reached them. It is mainly a test of stage, not a treatment on its own. It is usual in high-risk cancer, often skipped in low-risk cancer, and decided case by case in between. This page explains who is offered it, what happens, the risks and what the report words mean. 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 a pelvic lymph node dissection?
- Which men usually have their nodes removed?
- What actually happens when the nodes are removed?
- Limited and extended dissection, side by side
- The words on the pathology report, in plain language
- Four things families tell us, and what is actually true
- What this page cannot tell you, and what to ask
- Common questions about lymph node removal in prostate surgery
The short answer
What is a pelvic lymph node dissection?
A pelvic lymph node dissection means the surgeon removes the lymph nodes (small glands that filter fluid from the tissues) near the prostate, during the same operation that removes the prostate. They go to the laboratory to check whether any cancer has reached them.
Why the nodes matter
When prostate cancer spreads, it often goes to these pelvic nodes first. A scan can show nodes that are enlarged, but it cannot see a few cancer cells inside a normal-sized node. Only the microscope can. So the dissection is mainly a test. It tells your team the true stage (how far the cancer has spread) and shapes what, if anything, is recommended after surgery.
Does removing them treat the cancer?
Families often assume it does. The main value of the dissection is information. Whether taking out nodes that contain cancer improves the outcome on its own is still debated, and the studies so far do not settle it. Your surgeon will say it is being done to stage the cancer accurately, not as a treatment in itself.
Not every man having a prostatectomy needs a node dissection. Whether you do depends on how likely spread is, and that is worked out before the operation.Who is offered it
Which men usually have their nodes removed?
The decision rests on your PSA, your biopsy grade and what the MRI shows, put together as a risk of node spread.
Low-risk cancer
A low PSA, a low-grade biopsy and a small tumour on MRI. The chance of cancer in the nodes is small, so most teams skip the dissection. Removing nodes here adds risk without adding much information.
Intermediate-risk cancer
The grey zone. Many surgeons use a risk calculator built from your PSA, grade and stage. Above a certain estimated risk the nodes are taken; below it they are left. Ask which side of that line you fall on.
High-risk cancer
A high PSA, a high-grade biopsy or a tumour through the prostate capsule on MRI. Here a dissection is standard, and usually the wider version, because spread is more likely.
Usually taken here
- Grade Group 4 or 5 on biopsy
- Cancer through the capsule on MRI
- Suspicious nodes on any scan
Nodes already visible on a scan
If a PSMA PET or MRI shows enlarged or bright nodes, the whole plan may change. Some men are offered hormone treatment or radiation instead of surgery. Others have surgery with a full dissection. This is a tumour board discussion.
Not sure whether this applies to you?
Ask an oncologistDuring the operation
What actually happens when the nodes are removed?
Same anaesthetic, same cuts
The dissection is not a separate operation. It happens under the same general anaesthetic, through the same keyhole ports or the same open cut as the prostatectomy. You will not see extra wounds for it.
The fatty tissue is lifted away
The nodes sit inside fat that runs alongside the large blood vessels of the pelvis. The surgeon lifts this fat, with the nodes inside it, away from the vessels and nerves, which are left alone.
The tissue goes to the laboratory
Each packet of fat is labelled by where it came from. The pathologist counts the nodes inside and checks every one for cancer. This takes several days and is part of your final pathology report.
A drain may be left in
Lymph fluid keeps flowing after the nodes are gone, so a thin tube is sometimes left in the pelvis for a day or two to let it out. It is removed on the ward or at your first visit.
Two versions
Limited and extended dissection, side by side
Limited dissection
Extended dissection
Limited: removes only the nodes closest to the prostate
Extended: removes nodes from a wider area along the main pelvic vessels
Limited: fewer nodes, so it can miss spread that sits further out
Extended: more nodes, so more likely to find cancer if it is there
Limited: shorter, with a lower chance of a fluid collection afterwards
Extended: longer, with a higher chance of a fluid collection or leg swelling
Limited: now rarely recommended by major guidelines
Extended: the version guidelines recommend when a dissection is done at all
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On your report
The words on the pathology report, in plain language
- pN0
- Nodes were removed and examined, and none contained cancer.
- pN1
- Cancer was found in one or more of the removed nodes. It does not mean the surgery failed. It means your team now knows to plan further treatment, which is what the dissection was for.
- pNx
- No nodes were removed, so their status is unknown. Usual in low-risk cancer, and not a gap in your care.
- Nodes examined / nodes positive
- Two numbers, such as 14 examined and 1 positive. The first shows how thorough the dissection was. The second shows how many held cancer.
- Extranodal extension
- Cancer has grown through the outer wall of a node into the fat around it. Your team treats this as a sign the cancer is more likely to come back.
- Lymphocele
- A pocket of lymph fluid that collects in the pelvis after nodes are removed. Most are small and go away on their own. A large one may need draining.
Commonly believed
Four things families tell us, and what is actually true
"If they take the nodes out, the cancer cannot spread."
Removing nodes removes the cancer already in them. It does not close the road. Cancer cells can travel through the blood as well as through lymph, and some nodes sit outside the area a surgeon can safely reach.
"More nodes removed means a better surgeon."
The number of nodes in the report depends on the area removed and on how the pathologist counts them, not only on skill. What matters is whether the recommended template was followed. Ask which template your surgeon uses.
"A positive node means it is too late."
It is not. A positive node means the cancer has reached the pelvis, and it changes the plan. Many men with pN1 disease go on to hormone treatment, radiation or close PSA watching. Nothing on the node report on its own tells you how long anything will take.
Being straight with you
What this page cannot tell you, and what to ask
This page cannot tell you whether your nodes should be removed. That depends on your PSA, your biopsy grade, your MRI and your general health, weighed by the team that will operate. It also cannot tell you what a positive node would mean for you. The report describes what was found. It does not carry a prognosis (a forecast of how things will go).
The risks worth asking about
The extra risks of the dissection are a fluid collection in the pelvis, swelling of a leg or the groin, a small chance of injury to a nerve or vessel nearby, and a slightly longer operation. Most settle. Ask your surgeon how often they see each one.
Questions to take to your appointment
Ask whether a dissection is planned for you and why. Ask whether it will be limited or extended. Ask what happens if the nodes contain cancer, and whether that would mean radiation, hormone treatment or watching. Write the answers down.
If you already have a pathology report and the node section is confusing, call the helpline. A surgical oncologist can read it with you, and that costs nothing.Questions we are asked
Common questions about lymph node removal in prostate surgery
Does the node dissection make recovery harder?
It adds time to the operation, usually well under an hour, and does not usually change your hospital stay. Recovery feels much the same as a prostatectomy without it. You may notice a drain for a day or two.
Will I get swelling in my legs?
It can happen, but it is much less common after pelvic node removal than after armpit node removal in breast cancer. When it does occur it usually affects one leg or the groin and often settles over weeks. Tell your team early if a leg feels heavy or tight.
Can the nodes be checked without removing them?
Not reliably. A PSMA PET scan is better than older scans at spotting node spread, and a clearly abnormal node on it may change the plan. But a normal scan still cannot rule out small deposits.
My report says pN1. Do I need more treatment now?
Your team will usually discuss further treatment, but it is not always started straight away. Options include hormone treatment, radiation to the pelvis, or watching the PSA closely and acting if it rises. Which one depends on how many nodes were involved, your margins and your PSA after surgery.
How would I know if I have a lymphocele?
Small ones cause nothing and are found only if you happen to have a scan. A large one can cause a dull ache low in the belly, swelling in one leg, or fever if it becomes infected. Report any of those to your team.
Why does my report say only a few nodes were found?
Node counts vary a lot from man to man. The number depends on the template used, your own anatomy and how the pathologist counts nodes stuck together in fat. A low count does not by itself mean the dissection was poor.
My cancer is low risk. Should the nodes be taken anyway, to be safe?
That is a question for your surgeon, not for this page. In low-risk cancer the chance of node spread is small, and most guidelines advise against a dissection because the risks then outweigh the information gained. Ask for your own estimated risk of node spread and the threshold your surgeon uses.
Does Aarogyasri or my insurance cover the node dissection?
The dissection is normally part of the prostatectomy package rather than a separate item, so it is usually covered wherever the operation is. Aarogyasri, CGHS, ECHS and EHS are accepted at CION and most cashless insurers are empanelled. Call the helpline with your card details and we will check before you travel.
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Sources
- American Cancer Society — Surgery for prostate cancer
- Cancer Research UK — Surgery for prostate cancer
- National Cancer Institute — Prostate cancer treatment (PDQ), patient version
- Macmillan Cancer Support — Prostate cancer
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
Radical Prostatectomy: What the Operation InvolvesThe whole operation the dissection sits insideExtracapsular Extension and Seminal Vesicle InvolvementThe other findings that decide what comes nextDo You Need Radiation After Prostatectomy?What a positive node can lead toThe Pathology Report After SurgeryReading the whole report, not only the node sectionComplications and Red FlagsWhat to watch for in the weeks after any operation
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