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CION Cancer Clinics
HIPEC for stomach cancer that has spread to the peritoneum | CION Cancer Clinics
HIPEC, heated chemotherapy washed through the abdomen during surgery, is used for stomach cancer only in a small, carefully chosen group: people whose spread to the lining of the abdomen is limited, who have responded to chemotherapy first, and who are fit for a long operation. Most people with this kind of spread are treated with chemotherapy through a vein instead. This page explains what a team weighs and who it does not suit. 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
- Can HIPEC be used for stomach cancer that has reached the peritoneum?
- In which situations might a team consider HIPEC for stomach cancer?
- How does a team decide whether HIPEC is even an option?
- How does HIPEC for stomach cancer differ from HIPEC for other cancers?
- Who is HIPEC for stomach cancer not suitable for?
- Which words on the report matter for this decision?
- What families often assume about HIPEC, and what is actually true
- Common questions about HIPEC for stomach cancer
The short answer
Can HIPEC be used for stomach cancer that has reached the peritoneum?
Yes, but only in a small, carefully chosen group. When stomach cancer has spread to the peritoneum, the thin lining of the abdomen, most people are treated with chemotherapy through a vein. HIPEC, heated chemotherapy washed through the abdomen during surgery, is added only when the spread is limited and the person is fit for a long operation.
Why the peritoneum is the problem
Chemotherapy in the blood reaches the lining of the abdomen poorly, because the lining has a thin blood supply. HIPEC puts the drug directly on the surface where the cancer sits, and warming it helps it soak a little deeper.
Why the answer is more cautious than for other cancers
For pseudomyxoma and some colorectal cancers, surgery plus HIPEC is an accepted treatment. For stomach cancer the evidence is thinner and trial results are mixed. Stomach cancer spreads in a scattered, fine-grained way that is hard to clear, and the stomach usually has to come out as well. Teams therefore set a much lower limit on how much spread they will operate on.
This page explains what teams weigh. It cannot tell you whether the operation is right for one particular person.Where it fits
In which situations might a team consider HIPEC for stomach cancer?
Three settings come up in clinic. Each carries a different aim, and the aim shapes everything that follows.
Limited spread that has responded to chemotherapy
A few small deposits on the lining, no spread to the liver, lungs or distant glands, and a good response to chemotherapy given first. This is the group in which surgery plus HIPEC is most often discussed.
What the team looks for
- A low Peritoneal Cancer Index at laparoscopy
- Disease that shrank or stayed still on chemotherapy
- Fitness for a long operation
Cancer cells in the fluid, but nothing visible
A wash of fluid from the abdomen sometimes shows loose cancer cells even though the surgeon sees no deposits. Some centres offer chemotherapy into the abdomen here, often inside a study, to stop visible spread from developing.
Fluid build-up that keeps returning
Cancer on the lining can make the abdomen fill with fluid, called ascites. Heated or pressurised chemotherapy into the abdomen is sometimes used to slow this and make the person more comfortable. The aim is comfort, not removal of the cancer, and that should be said plainly before anything is agreed.
Not sure whether this applies to you?
Ask an oncologistThe decision path
How does a team decide whether HIPEC is even an option?
Scans and blood tests
A CT scan of the chest and abdomen, and often a PET-CT, looks for spread beyond the abdomen. Any deposit in the liver, lungs or distant glands usually closes the door on HIPEC, because the operation treats the lining only.
A look inside with a camera
Scans underestimate spread on the lining. A short keyhole operation, called a staging laparoscopy, lets the surgeon see the deposits, score them and take a fluid wash. This is the single most important test for this decision.
Chemotherapy through a vein first
Almost everyone in this setting has several cycles of chemotherapy before surgery is considered. The team is watching how the cancer behaves. Disease that grows during chemotherapy is very unlikely to be helped by an operation.
A second look and a tumour board
After chemotherapy, the laparoscopy is often repeated. The findings go to a meeting of surgical, medical and radiation oncologists. If the spread is still limited and you are fit, surgery plus HIPEC may be offered. If not, the team explains the alternatives.
Side by side
How does HIPEC for stomach cancer differ from HIPEC for other cancers?
Stomach cancer
Pseudomyxoma and colorectal spread
Offered only for a low volume of spread, usually after chemotherapy has worked
Offered across a wider range of spread, sometimes without chemotherapy first
Evidence still developing; trial results disagree with each other
Longer track record and clearer agreement between centres
The stomach itself is usually removed in the same operation
The main organ is often already out, or only part of the bowel is removed
Often used to control fluid build-up as much as to remove disease
Aim is usually to remove all visible disease
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Being straight with you
Who is HIPEC for stomach cancer not suitable for?
Most people whose stomach cancer has reached the lining are not candidates for HIPEC, and it is better to hear that early. These are the groups a team will usually rule out.
Spread beyond the lining
Deposits in the liver, lungs, bones or distant lymph glands mean the disease is in the bloodstream as well as on the surface. An operation on the lining does not reach it, and recovery would take months away from chemotherapy, the more useful treatment.
Widespread disease on the lining
Above a fairly low score at laparoscopy, the chance of removing everything visible falls sharply, and leaving disease behind removes most of the point of HIPEC. Wide involvement of the small bowel is a particular problem, because there is a limit to how much bowel can be taken out.
Not fit enough for the operation
This is a long operation with intensive care afterwards. Poor heart or lung function, low weight from months of eating badly, or a kidney problem can make the risk higher than any benefit. Being turned down on fitness is a safety judgement, not a verdict on the cancer.
If your centre does not offer HIPEC, ask whether a referral for an opinion is reasonable in your case.On your report
Which words on the report matter for this decision?
- Peritoneal carcinomatosis
- Cancer deposits scattered across the lining of the abdomen. It says where the cancer is, not how much there is.
- Peritoneal Cancer Index (PCI)
- A score the surgeon gives at laparoscopy, adding up the size of deposits in each region of the abdomen. For stomach cancer, teams accept only low scores for surgery.
- Positive cytology
- Loose cancer cells found in a wash of fluid from the abdomen, even when nothing can be seen. It is treated as a form of spread.
- Signet ring cell
- A type of stomach cancer named for how the cells look under the microscope. It spreads to the lining more readily and is harder to clear.
- Ascites
- Fluid collecting inside the abdomen. Cancer on the lining is a common cause, and a swelling belly is often the first sign.
Commonly believed
What families often assume about HIPEC, and what is actually true
"HIPEC is the strongest treatment, so we should push for it."
It is the most intensive treatment, which is not the same thing. For stomach cancer it helps a narrow group and can harm people outside it by delaying chemotherapy. The question is whether the spread is limited enough, not whether the treatment is strong enough.
"If the cancer is on the peritoneum, nothing can be done."
Chemotherapy through a vein remains the main treatment and helps many people. Fluid can be drained. Pain and eating problems can be managed. Being unsuitable for HIPEC does not mean being unsuitable for treatment.
"The heated chemo washes everything away, so the surgery is the easy part."
It is the other way round. The wash reaches only a very thin layer. What matters is how completely the surgeon removes the visible disease first, which is why the operation is long.
"A centre that says no is just not experienced enough."
Experienced centres say no more often, not less, because they have seen where the operation does not help. A second opinion is reasonable. A team that says yes to everyone is a warning sign, not a reassurance.
Questions we are asked
Common questions about HIPEC for stomach cancer
My father's CT says peritoneal deposits. Does that mean HIPEC?
Not on its own. The CT says the lining is involved. What decides the next step is how much is there, which a laparoscopy shows far better than a scan, and how the cancer responds to chemotherapy given first. Most are treated with chemotherapy rather than surgery.
Will the stomach have to be removed as well?
Usually yes, if surgery goes ahead. The operation aims to remove all visible cancer, and the original tumour is part of that. Whether all or part of the stomach is taken depends on where the tumour sits. A dietitian should be part of the plan from the start.
Why chemotherapy first? Why not operate straight away?
Because the team needs to see how the cancer behaves. If it shrinks or holds still, an operation has a purpose. If it grows despite chemotherapy, surgery would put you through a long recovery for little gain. It is a test of the cancer as much as a treatment.
How long is the operation and the hospital stay?
The operation commonly runs most of a day, because clearing disease from the lining is slow, careful work. Expect intensive care afterwards and then a further period on the ward. The total varies widely, so ask your own team for the range they see.
Is HIPEC the same as PIPAC?
No. HIPEC is heated liquid chemotherapy given once, during a major open operation. PIPAC is chemotherapy sprayed as a fine mist through keyhole ports, repeated every few weeks, and used mainly to control spread rather than remove it.
What if the surgeon opens up and finds more than expected?
This does happen, and you should be told beforehand that it can. If the spread is wider than the scans suggested, the surgeon may stop rather than continue with an operation that cannot remove everything. That is a safety decision, and the chemotherapy plan continues afterwards.
How do I know if a centre is the right place for this?
Ask any centre three things: how many of these operations its team does in a year, what its own complication figures are, and whether your case will go to a tumour board before a decision. Our helpline can help you shape the questions.
Is it covered by Aarogyasri or insurance?
Cover for HIPEC varies more than for standard stomach surgery, Aarogyasri, CGHS, ECHS, EHS and cashless insurance each handle it differently. Ask the centre's insurance desk to check your specific policy before any date is fixed.
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Sources
- National Cancer Institute — Gastric Cancer Treatment (PDQ) - Patient Version
- NICE — Cytoreduction surgery followed by hyperthermic intraoperative peritoneal chemotherapy for peritoneal carcinomatosis (IPG331)
- Cancer Research UK — Stomach cancer
- American Cancer Society — Stomach cancer
- National Cancer Institute — Definition of HIPEC
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
Who Is Eligible for HIPEC?The general fitness and spread rules every HIPEC decision starts fromThe Peritoneal Cancer Index (PCI) ExplainedThe score that decides how much spread is too muchPIPAC vs HIPEC: How They DifferThe option often discussed when HIPEC is not suitableIs HIPEC Worth It? What the Evidence ShowsWhere the evidence is strong and where it is still thinDeciding on Cancer SurgeryHow to weigh any major operation with your team
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Been told the cancer has reached the peritoneum?
Send us the scan and biopsy reports or call the helpline. A surgical oncologist will explain what the findings mean and which questions to take to your treating team. One helpline serves every CION centre.