Medical Oncologist
CION Cancer Clinics
Choosing surveillance instead of stomach removal with CDH1 | CION Cancer Clinics
A CDH1 carrier who is not ready for stomach removal can have specialist endoscopy about once a year instead. It is a recognised option, often used while a family is completed. It is less certain than surgery, because early cancers can hide under a normal lining. This page explains who surveillance suits, what each visit involves, and what it can and cannot find. At CION Cancer Clinics, our oncologists explain what a gene result means for you and your family, and plan the checks that follow.
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Medically reviewed by Dr. Naresh GunduConsultant Medical Oncologist · MBBS, DNB (Internal Medicine), DM (Medical Oncology, AIIMS) · last reviewed September 2026, next review due September 2027
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On this page
- Can a CDH1 carrier be watched instead of having the stomach removed?
- Who is surveillance usually offered to?
- What happens at a surveillance endoscopy?
- The words on your endoscopy report, in plain language
- What this page cannot tell you
- Four things carriers tell us about choosing surveillance
- Common questions about surveillance instead of surgery
The short answer
Can a CDH1 carrier be watched instead of having the stomach removed?
Yes. A carrier who is not ready for surgery, or decides against it, can have regular specialist endoscopy instead. It is a recognised option. It is also less certain than surgery, because early CDH1 cancers can hide under a normal-looking lining.
What surveillance can do
A careful endoscopy with many small tissue samples can find early spots of cancer cells before they cause symptoms. When found at that stage, the outlook after treatment is usually much better than when the cancer is found from symptoms.
What surveillance cannot do
It cannot prove there is no cancer. The samples cover only a tiny part of the stomach. Many carriers who later have surgery are found to have small spots that no endoscopy had picked up. Most of those spots had not yet spread.
How to think about the choice
For many people surveillance is a bridge. It buys time to finish having children, to recover from another illness or to feel ready. For some, especially those with no stomach cancer in the family, it may be the long-term plan.
Choosing surveillance is a reasonable decision. It does not mean you are ignoring advice.Who chooses it
Who is surveillance usually offered to?
These are the situations in which a genetic team is most likely to support watching rather than surgery.
Not ready yet
Living without a stomach changes eating for life. Some carriers want time to understand that before deciding. Surveillance keeps them safer while they think.
Planning a family
Many women prefer to complete pregnancy before surgery, because nutrition after stomach removal can be harder to manage. Surveillance is usually offered in the meantime.
No stomach cancer in the family
Carriers found through a breast cancer panel, with no relative who had stomach cancer, may face a lower risk. Surveillance can be a reasonable long-term choice here.
Often also applies to
- CTNNA1 carriers
- Families with no gene found
Surgery is not safe
Older carriers, or those with serious heart or lung illness, may not be fit for a major operation. Surveillance is then the main protection.
Not sure whether this applies to you?
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What happens at a surveillance endoscopy?
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Preparation
You fast beforehand and may be asked to take a drink that clears mucus from the stomach, so the lining can be seen clearly.
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A long, careful look
The endoscopy takes much longer than a routine one. A specialist uses a high-definition camera to inspect every area of the stomach slowly, often with you sedated.
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Many small samples
Samples are taken from any pale or unusual area, plus many random samples from every region, often dozens in all. The stomach is also checked for Helicobacter pylori.
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Results and review
A pathologist looks for signet ring cells. You and your team go through the result together. If cancer cells are found, surgery is usually advised.
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The next visit
If all is clear, the endoscopy is usually repeated about once a year. Women keep up their separate breast checks alongside.
On your report
The words on your endoscopy report, in plain language
- Surveillance endoscopy
- A planned camera test of the stomach in someone with no symptoms, done to look for early changes.
- Random biopsies
- Small samples taken from normal-looking areas, because early CDH1 cancers are often invisible.
- Targeted biopsies
- Samples taken from any area that looks pale or different.
- Signet ring cells
- The cancer cells seen in this condition. Finding them usually leads to a surgery discussion.
- Helicobacter pylori
- A common stomach infection that causes inflammation. It is treated with a course of tablets when found.
- Gastrectomy
- An operation to remove the stomach. A total gastrectomy removes all of it.
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Symptoms that cannot wait for the next endoscopy
If you vomit blood or something that looks like coffee grounds, or pass black, tarry stools, go to the nearest emergency department the same day and tell them you carry CDH1. Food sticking when you swallow, vomiting after meals or weight loss you cannot explain should be reported to your team within days. Do not save these symptoms for your next planned visit.
Being straight with you
What this page cannot tell you
It cannot tell you whether surveillance is safe enough for you. That depends on your family history, your variant, your age and what earlier endoscopies have shown. What your specific variant means is a question for the counsellor who ordered the test.
It cannot promise that surveillance will find everything
Even at expert centres, surveillance misses some early cancers. The studies so far are small, and most come from outside India. Anyone who chooses it should know that it lowers risk rather than removing it.
Who this does not apply to
This page is for people with a confirmed CDH1 fault who have been advised about surgery. If you have ordinary indigestion or one older relative with stomach cancer, you do not need this kind of endoscopy. Surveillance of this type is also only useful when done by a team that follows the specialist protocol. Ask how many of these endoscopies the team does each year, and whether the samples go to a pathologist who knows what to look for.
Worried that your endoscopy was not done to this standard? Call the helpline. Someone will explain what to ask for.Commonly believed
Four things carriers tell us about choosing surveillance
"A normal endoscopy means I can relax until next year."
It is good news, but early spots can be missed. Keep your next appointment, and report new symptoms straight away rather than waiting.
"Any endoscopy centre can do this test."
A routine endoscopy is quick and takes few samples. CDH1 surveillance needs a slow inspection and many samples, done by a team that knows the protocol.
"If I choose surveillance now, surgery is off the table."
You can change your mind at any time. Many carriers choose surgery later, once their family is complete or once they feel ready.
"If cancer cells are found, it is already too late."
Cells found on surveillance are usually at a very early stage. Surgery at that point often has a much better outlook than surgery for a cancer found from symptoms.
Questions we are asked
Common questions about surveillance instead of surgery
How often is the endoscopy done?
Usually about once a year, though your team may suggest a sooner repeat if a sample was unclear or a new area was seen. The schedule is written into your plan so you can keep track of it.
Is the endoscopy painful?
Most people have sedation, which makes the test comfortable. You may have a sore throat or feel bloated afterwards. You will need someone to take you home, as the sedation affects driving and judgement for the rest of the day.
What happens if cancer cells are found?
Your team will usually recommend removing the stomach, and will explain why. They will also check whether any spread has occurred. Cells found this way are usually at an early stage.
Can I get pregnant while under surveillance?
Yes. Many women use surveillance to complete their family before surgery. Endoscopy is usually paused during pregnancy unless there is a clear reason. Plan the timing with your team.
Does diet or lifestyle reduce the risk?
Not smoking, limiting alcohol and treating Helicobacter pylori are sensible for everyone. None of them has been shown to cancel the inherited risk, so they sit alongside surveillance rather than replacing it.
Is surveillance covered by insurance or Aarogyasri?
Cover for planned endoscopy in someone without cancer varies by policy and scheme. Ask your insurer in writing before starting. The CION team can help you work out what applies to you.
Can I switch to surgery later?
Yes. Surveillance does not close any door. You can ask to discuss surgery again at any visit, and many carriers do once their circumstances change.
Where do I start?
Bring your genetic report and any earlier endoscopy reports. A genetic counsellor and a specialist gastroenterologist can set out a plan together. Call the CION helpline if you are not sure who to see.
Your Specialists
Meet CION's oncologists. Bring your family history or genetic report to them.
Our medical oncologists see people with a strong family history of cancer, arrange genetic counselling and testing where it fits, and plan the checks that follow.
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
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Sources
- GeneReviews (NCBI) — Hereditary Diffuse Gastric Cancer
- MedlinePlus Genetics — Hereditary diffuse gastric cancer
- NHS — Gastroscopy
- National Cancer Institute — Genetic Testing for Inherited Cancer Susceptibility Syndromes
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.
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Bring your CDH1 report and any past endoscopy reports. We will help you find a team that follows the specialist protocol. One helpline serves every CION centre.