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Stomach Cancer Early Detection, Diagnosis, and Staging
Know the signs and symptoms of stomach cancer. Find out how stomach cancer is tested for, diagnosed, and staged.
Can stomach cancer be found early?
Cancer screening is the process of looking for cancer or precancer in people who have no symptoms of the disease.
In the United States, no major medical organizations recommend routine screening for stomach cancer in people who aren’t at increased risk. This is largely because this disease isn’t common in the US, so the benefits of screening most likely would not outweigh the possible risks (such as needing further tests or procedures, even in some people who might not end up having stomach cancer).
Because routine screening for stomach cancer isn’t done in the US, most people aren’t diagnosed until they have certain signs and symptoms that point to the need for medical tests.
In some countries in East Asia, where stomach cancer is much more common, mass screening of the population has helped find many stomach cancers at an early, possibly more curable stage.
The benefits of screening might outweigh the risks in people with certain risk factors for stomach cancer, such as:
- People with potentially precancerous stomach conditions, stomach polyps, or pernicious anemia
- People with inherited cancer syndromes that increase their risk, such as Lynch syndrome or familial adenomatous polyposis (FAP)
- People with close family members who’ve had stomach cancer
- People who’ve had stomach surgery
- First-generation immigrants from countries where stomach cancer risk is higher
Some doctors might recommend tests such as upper endoscopy at regular intervals in these people.
If you have risk factors that might increase your risk of stomach cancer, talk to your doctor about the possible pros and cons of stomach cancer screening for you.
Diffuse gastric and lobular breast carcinoma syndrome (DGLBCS)
People with this syndrome, formerly known as hereditary diffuse gastric cancer (HDGC), have a greatly increased risk of stomach cancer, which often develops at an early age.
Regular screening with thorough upper endoscopies might be an option for some people known to have a CDH1 or CTNNA1 gene mutation that causes DGLBCS, especially if a person has no family history of stomach cancer. However, doctors often recommend that people who have this syndrome consider having their stomach removed (a total gastrectomy), because their risk of stomach cancer is high.
It’s important to discuss your options thoroughly with your health care team, as each can have pros and cons. Surgery is more likely to be recommended if you meet certain criteria, such as having a family history of stomach cancer, symptoms that might be from stomach cancer, or some types of abnormal findings on an upper endoscopy.
What are the signs and symptoms of stomach cancer?
Stomach cancer often doesn’t cause symptoms right away. Some of the most common symptoms of stomach cancer are:
- Loss of appetite and weight loss (without trying)
- Abdominal (belly) pain
- Feeling full after only a small meal
- Heartburn or indigestion
- Nausea and vomiting
These symptoms can also be caused by other things. Still, if you have symptoms that might be from stomach cancer, especially if they don’t go away or are getting worse, have them checked by a health care professional.
How is stomach cancer diagnosed?
If stomach cancer is suspected, exams and tests will be needed to find out for sure. If cancer is found, other tests might then be needed to learn more about it.
Stages and outlook for stomach cancer
After a stomach cancer diagnosis, many people want to understand what to expect. Doctors use information about a tumor’s stage (extent) to decide what treatment is best for each specific case.
Survival rates are a way to measure how many people survive a certain type of cancer over time. Some people find this information helpful, while others prefer to focus more on treatment plans and next steps.
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- References
Developed by the American Cancer Society medical and editorial content team with medical review and contribution by the American Society of Clinical Oncology (ASCO).
Chan AOO, Wong BCY. Gastric cancer screening. UpToDate. 2025. Accessed at https://www.uptodate.com/contents/gastric-cancer-screening on December 5, 2025.
Hebbard P, Schrader KA. Diffuse gastric and lobular breast cancer syndrome. UpToDate. 2025. Accessed at https://www.uptodate.com/contents/diffuse-gastric-and-lobular-breast-cancer-syndrome on December 5, 2025.
National Cancer Institute. Stomach (Gastric) Cancer Screening (PDQ®)–Health Professional Version. 2025. Accessed at https://www.cancer.gov/types/stomach/hp/stomach-screening-pdq on December 5, 2025.
Last Revised: February 27, 2026
American Cancer Society medical information is copyrighted material. For reprint requests, please see our Content Usage Policy.
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