Medical Oncologist
CION Cancer Clinics
Pelvic lymph node surgery after cancer is found in the groin | CION Cancer Clinics
When cancer is found in the groin lymph nodes, the team may consider removing the pelvic nodes too, because those lie next along the drainage path. It is not offered to everyone. The decision rests on the type of cancer, how many groin nodes were affected, whether cancer broke through a node and what scans show. Radiotherapy or close scan checks are sometimes chosen instead. This page explains what the team weighs. 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
- Why would pelvic nodes be removed after a positive groin?
- What makes the team consider pelvic surgery?
- Does the approach differ between cancers?
- What happens between the groin report and a pelvic operation?
- How is pelvic node surgery done, and what does it add?
- What do families often get wrong about this decision?
- What do the words on your report mean?
- Common questions about pelvic node dissection
The short answer
Why would pelvic nodes be removed after a positive groin?
Pelvic node dissection is sometimes considered after cancer is found in the groin nodes, because lymph fluid from the groin drains next into nodes inside the pelvis. If the groin nodes hold cancer, some cells may have travelled one step further. Removing the pelvic nodes lets the team check for this and take out any cancer they find.
Where the pelvic nodes are
They sit deep inside the lower belly, along the large blood vessels that run down to the leg and beside the bladder. Your report may call them iliac or obturator nodes. Unlike groin nodes, they cannot be felt, so the team relies on scans and sometimes surgery to know what they hold.
A decision, not an automatic next step
Many people with a positive groin node never have pelvic surgery. For some cancers, radiotherapy to the pelvis is used instead, with a different set of trade-offs. For others, scans that show nothing in the pelvis lead the team to watch closely. This page explains what they weigh. It cannot tell you which choice fits you.
"Positive" on a node report means cancer cells were found in that node. On its own, it does not tell you your outlook.What the team weighs
What makes the team consider pelvic surgery?
No single finding decides it. The team reads these together at a tumour board.
How many groin nodes held cancer
A small deposit in a single node is treated differently from cancer in several nodes. The more nodes involved, the more likely the team is to look further along the chain.
Spread outside the node
The pathologist checks whether cancer has broken through the thin outer layer of a node. This often tips the balance towards treating the pelvis as well.
The highest groin node
The deepest node at the top of the groin sits at the doorway to the pelvis. Cancer in this node draws attention to the pelvic nodes just beyond it.
What the scans show
A CT, MRI or PET-CT may show enlarged pelvic nodes. Nodes that look clearly involved change the plan. Nodes that look normal can still hold very small deposits.
You as a whole person
Your fitness for another operation, any earlier radiotherapy, how the groin wound healed and what matters most to you all count.
Not sure whether this applies to you?
Ask an oncologistIt depends on the cancer
Does the approach differ between cancers?
Cancer
How the pelvic nodes are usually handled
Penile cancer
Pelvic node surgery is often advised when more than one groin node is involved or cancer has broken through a node
Vulval cancer
Radiotherapy to the groin and pelvis is used far more often than pelvic surgery
Melanoma of the leg or lower body
Deeper pelvic nodes may be removed when scans show them, alongside drug treatment planned by a medical oncologist
Anal cancer
Nodes are usually treated with chemotherapy and radiotherapy together, so this surgery is uncommon
The pathway
What happens between the groin report and a pelvic operation?
-
The groin pathology report
It lists how many nodes were removed, how many held cancer, the size of the largest deposit and whether cancer broke through a node. Ask for a copy and keep it with your scans.
-
Scans of the pelvis and beyond
A CT, MRI or PET-CT checks the pelvic nodes and looks for spread elsewhere. If cancer has spread further, pelvic surgery alone may no longer make sense, and the plan changes.
-
Tumour board discussion
Surgical, radiation and medical oncologists review everything together and compare surgery, radiotherapy, drug treatment and close watching.
-
The options explained to you
You should hear why one route is suggested, what the others were and what each adds to recovery. Bring the family member who helps you make decisions.
-
The operation, now or later
Pelvic nodes are sometimes removed in the same operation as the groin nodes, and sometimes in a second operation once the groin has healed or after chemotherapy.
Leave a number, we will call you
One field. No form to fill in, and no charge for the call.
The operation
How is pelvic node surgery done, and what does it add?
The pelvic nodes are reached through the lower belly, either through a cut above the groin or by keyhole surgery. The surgeon removes the nodes and fatty tissue around the large blood vessels on that side, usually without opening the bowel.
Open or keyhole
Open surgery uses a cut in the lower abdomen, sometimes joined to the groin cut. Keyhole or robot-assisted surgery uses small cuts and a camera. Which suits depends on your body, any earlier surgery and the surgeon's experience. Ask your centre which approaches it offers and why one is suggested for you.
What it can add to recovery
Removing a second group of nodes on the same side raises the chance of long-term leg swelling compared with groin surgery alone. Fluid can also collect inside the pelvis. A nerve that helps bring the thigh inwards runs through this area, so weakness in that movement is possible, though uncommon. Your surgeon will also discuss bleeding, blood clots and bladder problems.
Who it may not suit
People whose cancer has already spread beyond the pelvis, people not fit for another anaesthetic, and some who have had pelvic radiotherapy are often offered other treatment instead.
Commonly believed
What do families often get wrong about this decision?
"If the groin nodes had cancer, the pelvic nodes must have it too."
Often they do not. Cancer usually moves one step at a time, and many people with positive groin nodes have clear pelvic nodes. Treatment to the pelvis is there to find or treat disease that may be present, not because it certainly is.
"Removing more nodes always means a better result."
More surgery also means more leg swelling and a longer recovery. Teams add pelvic treatment when the findings suggest it is worthwhile, not simply to take out as much as possible.
"Choosing radiotherapy instead means giving up."
For some cancers, especially vulval cancer, radiotherapy to the pelvis is the usual treatment after positive groin nodes. It is a different route to the same goal, not a lesser one.
"A normal scan means the pelvic nodes are definitely clear."
Scans cannot see very small deposits. A normal scan is reassuring and often supports watching closely, but your team may still suggest treatment if the groin findings were significant.
On your report
What do the words on your report mean?
- Positive node
- A lymph node in which cancer cells were found under the microscope.
- Extranodal extension
- Cancer has grown through the thin outer layer of a node into the tissue around it. It may be shortened to ENE.
- Cloquet's node
- The highest node in the deep groin, lying at the entrance to the pelvis.
- Iliac and obturator nodes
- Groups of pelvic nodes along the main blood vessels to the leg and on the inner wall of the pelvis.
- Staged surgery
- The groin and pelvic nodes removed in two separate operations rather than one.
- Adjuvant treatment
- Radiotherapy or drug treatment given after surgery to lower the chance of the cancer coming back.
Questions we are asked
Common questions about pelvic node dissection
My groin node was positive. Will I definitely need pelvic surgery?
No. Many people do not. The team looks at the type of cancer, how many nodes were positive, whether cancer broke through a node and what the scans show. Some people are offered radiotherapy, some drug treatment and some close scan checks. Ask which options were discussed for you, and why.
Can the groin and pelvic nodes be removed in one operation?
Sometimes. When scans already point to the pelvis, both may be done together. In other cases the pelvic surgery follows later, once the groin report is back or after chemotherapy. Your surgeon will explain which order suits your situation and what each means for recovery.
How long will I stay in hospital?
It depends on whether the surgery is open or keyhole, whether the groin is operated on at the same time, and how quickly you recover. Keyhole surgery often means a shorter stay. Ask your surgeon for a realistic estimate before the operation so the family can plan time off work.
Will my leg swell more after pelvic surgery?
The chance of long-term leg swelling is higher when both groin and pelvic nodes are removed on the same side, though not everyone develops it. Early walking, raising the leg, a stocking if advised and early help from a lymphoedema therapist all make a difference.
Is radiotherapy an alternative to the operation?
For some cancers, yes. Radiotherapy to the pelvis is the usual approach in vulval cancer and an option in some others. It avoids another operation but brings its own effects on the skin, bowel and bladder. The team will explain which suits your cancer and why.
Can this surgery be done by keyhole or robot?
In some centres, yes. Whether it suits you depends on your body, any earlier surgery or radiotherapy and the surgeon's experience. Ask your centre which methods it offers, how often its team does this operation, and why a particular approach is suggested for you.
What if cancer is found in the pelvic nodes too?
The report guides the next step. Your team may suggest radiotherapy, chemotherapy or other drug treatment afterwards. Cancer in the pelvic nodes changes the stage, which describes how far the cancer has spread, so the whole plan is reviewed again at the tumour board.
Should we get a second opinion before deciding?
Asking for one is reasonable and common. Bring the groin pathology report, the slides or tissue block if you can, and every scan. A second opinion is most useful when it reviews the same reports and images, not just a description of them.
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
- American Cancer Society — Surgery for penile cancer
- Cancer Research UK — Surgery for vulval cancer
- National Cancer Institute — Melanoma treatment (PDQ), patient version
- National Cancer Institute — Lymphedema (PDQ), patient version
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
Which Cancers Need Groin Node SurgeryWhy the cancer type shapes every node decisionSuperficial vs Deep Inguinal DissectionHow far the groin operation itself goesLeg Lymphoedema After Groin Node RemovalThe long-term swelling that more node surgery can bringThe Pathology Report After SurgeryReading the node counts and findings on your reportDeciding on Cancer SurgeryQuestions to ask before agreeing to another operation
Talk to us
Been told the groin nodes were positive?
Tell us what the pathology report says and what has been suggested. We will help you reach the right specialist to talk through the options. One helpline serves every CION centre.