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Preventive stomach removal in CDH1 families: making the decision | CION Cancer Clinics
For people with a confirmed harmful CDH1 gene change, removing the whole stomach is the main way guidelines suggest to lower stomach cancer risk. It is major surgery that changes eating for life, so it is decided slowly with a specialist team. This page explains what is weighed, what happens, what life afterwards is like, and who it may 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
- Should a CDH1 carrier have the stomach removed?
- What does the team weigh before suggesting surgery?
- What happens between the gene result and the operation?
- What is life like without a stomach?
- What do families often believe about this decision?
- Which words will you meet, and what do they mean?
- Who may not be suited, and what can this page not tell you?
- Common questions about preventive gastrectomy for CDH1
The short answer
Should a CDH1 carrier have the stomach removed?
For people with a confirmed harmful change in the CDH1 gene, removing the whole stomach is the main way guidelines suggest to lower the risk of stomach cancer. It is a major operation that changes how you eat for the rest of your life, so the decision is made slowly, with a specialist team, and never on the day you get the gene result.
Why this gene is different
CDH1 changes are linked with a type of stomach cancer called diffuse gastric cancer. It tends to spread in thin sheets under the stomach lining rather than forming a lump. That makes it very hard to see on an endoscopy, the camera test passed down the throat. Early cancer cells are often found in stomachs removed from carriers who had normal camera tests beforehand.
Why the decision still takes time
Estimates of how often carriers develop stomach cancer have changed as more families have been studied, and they differ from family to family. Losing the stomach brings lasting changes to eating, weight and energy. Both sides are real, and the balance is not the same for everyone.
This page explains what teams weigh. It cannot tell you whether surgery is right for you or your child.The decision
What does the team weigh before suggesting surgery?
No single factor settles it. These are the questions a specialist team usually works through with a family.
Is the gene result certain?
A result marked as harmful is very different from a variant of uncertain significance. Surgery is not usually suggested on an uncertain result alone.
What has happened in the family?
Who had stomach cancer, at what age, and whether women in the family had lobular breast cancer. A family tree drawn with a genetic counsellor carries a lot of weight.
Your age and stage of life
Teams usually avoid operating on children and often discuss surgery in early adult life. Pregnancy plans, studies and work all shape the timing.
Your health and your weight
Most people lose weight after the stomach is removed. Someone who is already thin, or has other illness, needs careful planning first.
Usually assessed
- Nutrition and body weight
- Heart and lung fitness
- Support at home during recovery
Not sure whether this applies to you?
Ask an oncologistThe pathway
What happens between the gene result and the operation?
Genetic counselling
The result is explained, and relatives who may want testing are identified. Ask for the report in writing and keep a copy for the family.
A detailed camera test
Many teams do a careful endoscopy with many small tissue samples before surgery, both to check for early cancer and to guide planning.
Meeting the dietitian
You learn how eating will change, and your weight and nutrition are built up before the operation where possible.
The operation
The whole stomach is removed, and the food pipe is joined directly to the small bowel. You may see this written as a total gastrectomy with a Roux-en-Y join.
Afterwards
What is life like without a stomach?
People do live full lives without a stomach, but eating is never quite the same again. The first months are the hardest. Most people find a new routine over time, with support from a dietitian.
Eating in small amounts
Without a stomach to hold food, you eat small meals often through the day. Large meals, very sweet foods and drinking a lot with meals can cause dumping, a spell of cramps, sweating, dizziness or loose motions soon after eating. Learning which foods trigger it is part of recovery.
Weight and energy
Weight loss is common in the first year and some of it is usually permanent. Tiredness can last for months. Keeping a weight diary and sharing it at follow-up helps the team act early.
Vitamins for life
The stomach is needed to absorb vitamin B12, so replacement is needed for life, usually as injections. Iron, calcium and vitamin D are also checked, because a low haemoglobin and weak bones can develop. Your doctor sets the plan. Do not stop any supplement on your own.
Surgery also carries the usual risks of a major operation, including leaks at the join. Ask your surgeon to explain these for you.Leave a number, we will call you
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Commonly believed
What do families often believe about this decision?
"His endoscopy was normal, so he does not need to think about surgery."
A normal camera test is reassuring but not the same as a clear stomach. This type of cancer can hide under the lining. Your team will explain what the test can and cannot rule out.
"Everyone in the family with the gene must be operated on at once."
Each person decides for themselves, on their own timeline. Some choose regular camera tests for a while. A relative's choice is not a rule for you.
"Once the stomach is gone, she can stop all checks."
Stomach cancer risk falls sharply, but women with CDH1 changes also have a higher chance of lobular breast cancer. Breast checks and vitamin follow-up usually continue.
"Without a stomach, a person cannot eat normal home food."
Most people go back to ordinary food, including rice and dal, in smaller portions spread through the day. It takes practice and patience, not a special diet for ever.
On your report
Which words will you meet, and what do they mean?
- CDH1
- A gene that helps cells stick together. Harmful changes in it cause hereditary diffuse gastric cancer.
- Hereditary diffuse gastric cancer (HDGC)
- The inherited condition linked with CDH1, raising the chance of stomach cancer and lobular breast cancer.
- Variant of uncertain significance (VUS)
- A gene change whose effect is not yet known. It is not the same as a harmful result.
- Signet ring cells
- The cancer cells typical of this condition, named after their shape under the microscope.
- Dumping syndrome
- Cramps, sweating, dizziness or loose motions soon after eating, when food moves too quickly into the bowel.
Being straight with you
Who may not be suited, and what can this page not tell you?
Surgery is not usually suggested for children, for people with only an uncertain gene result, or for someone whose health or nutrition would make recovery unsafe. Some carriers with no stomach cancer in the family choose regular camera tests instead, at least for a time.
What this page cannot do
It cannot give your own cancer risk, tell you the right age for you, or say whether surgery is the right choice. It cannot tell you what a particular centre offers. Ask your centre how often they perform this operation and who looks after nutrition afterwards.
Questions worth taking with you
Ask how certain the gene result is. Ask what regular camera tests could and could not find in your case. Ask who will manage vitamins and weight after surgery, and for how long.
Questions we are asked
Common questions about preventive gastrectomy for CDH1
At what age is the stomach usually removed?
Guidelines generally discuss surgery in early adult life rather than childhood, but there is no single age for everyone. The family history, your health and your plans all matter. Your team will explain the timing they suggest and why, and you can take time to think it over.
Can I have regular endoscopies instead?
Some carriers choose regular, detailed camera tests with many samples, often while they decide or delay surgery. These tests can find some early cancers, but they can miss others because of how this cancer grows. Ask your team to explain those limits plainly.
How long will I be in hospital?
Stays vary with the approach and with how recovery goes, and eating is restarted in small steps. Your surgeon will give you an expected plan before the operation. Ask for it in writing, and ask what would make the stay longer.
Will I be able to work again?
Most people return to work, though tiredness and the need to eat often can make the first months hard. Desk work usually comes back sooner than physical work. Talk to your employer early about breaks for small meals.
Can a woman get pregnant after this surgery?
Pregnancy is possible after the stomach is removed, but nutrition needs very close attention. Many teams suggest waiting until weight and vitamins are steady. If you plan children, discuss the order of pregnancy and surgery with both your surgeon and your gynaecologist.
My father died of stomach cancer. Should I be tested?
A genetic counsellor can look at your family history and say whether CDH1 testing makes sense. Many stomach cancers are not inherited. Testing is usually most useful when a family member with cancer can be tested first, or a family gene change is already known.
Is this operation done by keyhole surgery?
Some centres do it through keyhole surgery, and others prefer an open operation. The approach depends on the surgeon's experience and your own body. Ask your centre which approach they use, how often they perform it and why they suggest it for you.
Does insurance cover preventive stomach removal?
Cover for preventive surgery varies, and approval often needs your gene report and a specialist's letter. Aarogyasri, CGHS, ECHS and EHS rules differ, as do cashless insurance policies. Call the helpline with your card or policy details and we will help you check.
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Sources
- Cancer.Net — Hereditary Diffuse Gastric Cancer
- National Cancer Institute — Stomach (Gastric) Cancer
- Cancer Research UK — Stomach cancer
- NHS — Stomach 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
Genetic Testing Before Preventive SurgeryWhy the gene result has to be certain firstSurveillance Instead of Preventive SurgeryWhat regular camera tests can and cannot findRecovery, Eating and Getting Back to LifeEating and energy in the months after surgeryDeciding When You Do Not Have Cancer YetWeighing a permanent choice while you are well
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Tell us what has been found so far and we will help you reach a surgical oncologist who can talk through the decision with you. One helpline serves every CION centre.