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D2 lymph node dissection, explained | CION Cancer Clinics
A D2 lymph node dissection removes the lymph glands beside the stomach and the next ring of glands out along the arteries that feed it. It is done during the gastrectomy itself and is the standard extent of gland removal for stomach cancer being operated on to clear it. This page explains what is taken, what the gland count on your report means, and what to ask. 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 does D2 lymph node dissection mean?
- Where the glands come from
- What happens to the glands once they are out
- Words you will see on the pathology report
- What families read into the gland count, and what is true
- Who a D2 dissection is not for, and what this page cannot tell you
- Common questions about D2 lymph node dissection
The short answer
What does D2 lymph node dissection mean?
A D2 dissection means the surgeon removes not only the lymph glands sitting against the stomach, but also the glands further out along the main arteries that feed it. It is done as part of the same operation as the gastrectomy, and it is the standard extent of gland removal for stomach cancer that is being operated on to remove it completely.
Why glands are removed at all
Lymph glands are small filters along the vessels that drain fluid from the stomach. Stomach cancer travels through those vessels first, so the glands are the first place it reaches. Removing them does two things. It takes out cancer that may already be sitting there. And it lets the pathologist count how many glands are involved, which is what sets the stage and decides whether chemotherapy follows.
D1, D2 and what the numbers mean
The glands are grouped into numbered stations. D1 means the stations right beside the stomach. D2 adds the next ring out, along the arteries that come off the main trunk below the diaphragm. A D2 dissection is more work for the surgeon and takes longer, but it removes the glands where spread is most likely to hide.
Your surgeon may write "D2" or "D2 lymphadenectomy" on the consent form. They mean the same thing.Inside the operation
Where the glands come from
The stations are grouped by which vessel they sit along. A D2 dissection clears all four groups below.
Along the stomach itself
The glands on the inner and outer curves of the stomach, and beside the exit. These come out with the stomach and its fatty apron in one piece. This is the D1 group.
Along the left gastric artery
The main artery to the stomach is tied off close to its origin, and the glands along its length are lifted away with it. This is one of the commonest places for stomach cancer to reach first.
Along the liver artery and the main trunk
The surgeon clears the fat and glands off the artery that runs to the liver and off the short trunk it comes from. This is fine work beside large vessels, and it is the part that makes D2 a specialist operation.
Along the spleen artery
The glands along the artery to the spleen are cleared. In most cases the spleen itself is left in place. It is removed only when glands at its root are clearly involved, because taking it adds risk without adding benefit otherwise.
Ask whether the spleen is planned to be removed. The answer changes your vaccination advice afterwards.Not sure whether this applies to you?
Ask an oncologistAfter the operation
What happens to the glands once they are out
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The specimen goes to the laboratory
The stomach and the glands are sent as one piece, with the stations marked so the pathologist knows where each gland came from.
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The glands are counted and examined
Each gland is cut and checked under the microscope for cancer cells. Guidelines ask for at least 16 glands to be examined, because too few makes the stage unreliable.
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The N stage is set
The report gives two numbers: how many glands were found and how many contained cancer. This becomes the N part of your stage, from N0 (none involved) upwards.
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The tumour board reads the report
The gland result, together with how deep the tumour went and whether the edges were clear, decides whether chemotherapy is recommended after surgery.
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You are told, in plain language
Ask your surgeon to go through the gland count with you. It is the line on the report that families most often misread.
On your report
Words you will see on the pathology report
- Lymph node yield
- The total number of glands the pathologist found in the removed tissue. A higher count makes the stage more reliable.
- Positive node
- A gland that contained cancer cells. "Negative" means none were found in that gland.
- pN0, pN1, pN2, pN3
- The gland stage, based on how many were positive. The "p" means it was set from the actual tissue, not from a scan.
- Extranodal extension
- Cancer had grown through the outer wall of a gland into the fat around it. It is noted because it affects the stage.
- Station
- The numbered location a gland was taken from. The stations tell the team which route the cancer was using.
- D2+ or extended
- Glands beyond the standard D2 ring were also removed, usually because a scan suggested involvement there.
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Commonly believed
What families read into the gland count, and what is true
"They took out thirty glands, so it must have spread everywhere."
The number removed says how thorough the operation was, not how far the cancer had gone. Thirty glands removed with two involved is a better report than eight removed with two involved. The number that matters is how many contained cancer.
"All the glands were clear, so no chemotherapy is needed."
Clear glands are good news, but they are one part of the stage. How deep the tumour went through the wall also counts, and chemotherapy may still be advised. Equally, involved glands do not mean the operation failed. They mean the treatment plan continues.
"Removing glands weakens the body's defences."
The glands beside the stomach are a small part of a system spread through the whole body. Removing them does not lower your immunity. It does not cause the arm or leg swelling seen after some other cancer operations, because the drainage of the limbs is not touched.
"A D2 operation is only for advanced cancer."
It is the standard for most stomach cancers being removed with the aim of clearing them, including early ones that have grown into the wall. The exception is the very earliest cancers confined to the lining, which may be removed through the endoscope with no glands taken at all.
Being straight with you
Who a D2 dissection is not for, and what this page cannot tell you
A D2 dissection is not done when the cancer has already spread beyond the glands to the liver or the belly lining, because clearing the glands cannot change what the spread elsewhere does. It is also not done for the earliest cancers that sit only in the lining, where an endoscopic removal may be enough.
What the surgeon weighs
Whether the scans show glands beyond the D2 ring. Your fitness for a longer operation. Whether the spleen or the tail of the pancreas would have to come out to reach involved glands, and whether that is worth the added risk in your case. These are judgement calls, and they are made at the tumour board rather than by one person.
What this page cannot tell you
It cannot tell you your stage, how many glands will be involved, or what the cancer will do afterwards. Those come from the pathology report after the operation, not before. If you have been given a gland count and do not know what it means, bring the report to the helpline and someone will read it with you.
Worth asking before surgery: is a D2 dissection planned, and how many gastrectomies does this team do each year? Both are fair questions.
Did you know
The D system of numbered stations was developed in Japan, where stomach cancer is common and has been operated on in large numbers for decades. It is now used by surgeons everywhere to describe exactly which glands were removed.
Questions we are asked
Common questions about D2 lymph node dissection
Does removing more glands make the operation riskier?
It makes it longer, and the dissection along the main arteries is delicate work. In experienced hands the added risk is small, and it is lowest when the spleen and pancreas are left in place. This is why the number of these operations a team does each year is a fair thing to ask.
How will I know how many glands were removed?
It is written on the pathology report, usually as two numbers: the total examined and the number that contained cancer. The report normally arrives within a week or two of the operation. Ask your surgeon to read it with you rather than working it out from the internet.
What if fewer than sixteen glands were found?
It happens, especially after chemotherapy before surgery, which can shrink glands. It does not mean the operation was poor. It does mean the stage is a little less certain, and your oncologist will take that into account when advising on treatment after surgery.
Will my spleen be removed?
Usually not. The spleen is taken only when the glands at its root are clearly involved, most often with cancers high on the outer curve of the stomach. If it is removed, you will need certain vaccinations afterwards and should carry a card saying you have no spleen. Ask before the operation.
Can a D2 dissection be done by keyhole surgery?
Yes, in centres that do it regularly. The same stations are cleared through smaller cuts. Whether it is right for you depends on the tumour, your build and the team's experience. Ask your centre which approach is planned and how often they do it that way.
Does a gland being positive mean the cancer has spread?
It means cancer cells had reached that gland, which is regional spread and is part of the stage. It is not the same as spread to distant organs. Many people with positive glands go on to chemotherapy and long follow-up. The gland count changes the plan, not the goal.
Will I have swelling afterwards like people do after breast surgery?
No. The swelling of the arm after breast surgery happens because the drainage of the arm is removed. A D2 dissection removes glands deep inside the belly, and the drainage of the arms and legs is untouched. Belly bloating in the early weeks is common, but it is a different thing.
Is the gland removal covered by insurance separately?
It is part of the gastrectomy, not a separate procedure, so it is covered within the same approval. Aarogyasri, CGHS, ECHS and EHS are accepted, and most cashless insurers are empanelled. Call the helpline with your card details and we will check your cover.
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Sources
- Cancer Research UK — Surgery for stomach cancer
- Macmillan Cancer Support — Surgery for stomach cancer
- American Cancer Society — Surgery for Stomach Cancer
- National Cancer Institute — Gastric Cancer Treatment (PDQ) - Health Professional 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
Gastrectomy: What the Operation InvolvesThe whole operation, from admission to the first mealTotal vs Subtotal GastrectomyHow much stomach comes out, and what decides itThe Pathology Report After SurgeryReading the report that carries the gland countChoosing a Surgeon and a CentreWhat to ask about experience with this operation
Talk to us
Have a pathology report with a gland count you do not understand?
Send it to us or call the helpline. A surgical oncologist will read it with you and explain what the next step actually is. One helpline serves every CION centre.