Introduction
Gastric cancer develops when cells in the lining of the stomach grow abnormally and, without treatment, can spread more deeply into the stomach wall and beyond. Outlook and treatment options depend heavily on how early it's found — which is exactly why understanding risk factors and taking persistent digestive symptoms seriously matters. At KAGE, upper GI endoscopy is central to both diagnosing gastric cancer and, for early disease confined to the stomach lining, treating it directly through endoscopic resection rather than surgery.
How common is gastric cancer, and why does it vary so much across India
India's overall gastric cancer incidence is lower than in high-incidence countries such as Japan and South Korea. However, this national average conceals substantial regional variation: the Kashmir Valley has gastric cancer rates reported at 3 to 6 times higher than other Indian cities, with local research pointing to specific dietary compounds (nitrosamines, linked to certain traditional foods and preparation methods) as a possible contributing factor. Northeastern states — including Mizoram, Meghalaya, and Nagaland — show some of the highest district-level incidence rates recorded anywhere in the country. Notably, some southern states, including Kerala and Tamil Nadu, have also been flagged in Indian epidemiological reviews as having incidence rates comparable to global high-risk areas. This regional heterogeneity is a reminder that national averages can understate real risk in specific populations, and that where someone is from — not just generic global statistics — is relevant context in assessing gastric cancer risk.
What causes gastric cancer
- Chronic Helicobacter pylori infection — one of the strongest and most consistent risk factors identified worldwide
- A diet high in salted, smoked, or pickled foods, and low in fresh fruits and vegetables
- Tobacco use
- Long-standing atrophic gastritis, including the autoimmune form (see the Gastritis page)
- Family history of gastric cancer
- Certain inherited genetic syndromes, in a smaller proportion of cases
- Previous stomach surgery
Symptoms of gastric cancer
Early gastric cancer often causes no symptoms, or only vague, indigestion-like discomfort easily mistaken for gastritis — a major reason diagnosis is frequently delayed. As it progresses, symptoms can include:
- Persistent indigestion or upper abdominal discomfort
- Feeling full after eating only a small amount
- Unintended weight loss
- Nausea or vomiting
- Difficulty swallowing, if the cancer is near the top of the stomach
- Blood in the stool, or signs of anemia from ongoing blood loss
How gastric cancer is diagnosed
- Upper GI endoscopy with biopsy — the definitive diagnostic test, allowing direct visualization and tissue sampling
- CT scan — used to assess the extent of disease and check for spread
- Endoscopic ultrasound (EUS) — helps determine how deeply a tumor has invaded the stomach wall, important for treatment planning
- H. pylori testing, given its strong association with gastric cancer risk
Gastric cancer treatment: matched to stage
- Early-stage disease confined to the stomach lining: endoscopic resection (EMR or ESD) can sometimes treat the cancer directly, without surgery — an option only available when disease is caught early enough
- More locally advanced disease: typically involves surgery, often combined with chemotherapy before and/or after
- Advanced or metastatic disease: managed with systemic therapy, with treatment goals and options discussed individually based on the specific situation
- Given the range of scenarios, treatment planning for gastric cancer is inherently multidisciplinary, often involving gastroenterology, surgical oncology, and medical oncology together
Screening and awareness for higher-risk individuals
Population-wide gastric cancer screening isn't standard practice across most of India, but individuals with recognized risk factors — confirmed H. pylori infection, long-standing atrophic gastritis, a family history of gastric cancer, or residence in one of the higher-incidence regions — may benefit from a more proactive conversation with a gastroenterologist about symptom awareness and, in some cases, endoscopic evaluation, rather than waiting for symptoms to become pronounced.
Gastric cancer care at KAGE
Early gastric cancer confined to the mucosa can often be removed whole by endoscopic mucosal resection, with the stomach left in place — which is why persistent upper GI symptoms in an at-risk patient are scoped rather than treated blind. Our gastroenterologists stage with EUS, follow the same early-detection pathway used for esophageal cancer, and relieve advanced gastric outlet obstruction with EUS-guided gastrojejunostomy. If symptoms have persisted or a biopsy needs a second opinion, book a consultation.
Frequently asked questions
Early symptoms are often vague and indigestion-like, which is part of why the condition can be diagnosed late. Persistent discomfort, unintended weight loss, feeling full quickly, or difficulty swallowing warrant prompt evaluation rather than assuming it's routine indigestion.
Yes — chronic H. pylori infection is one of the strongest known risk factors for gastric cancer, which is part of why H. pylori testing and treatment matter beyond just resolving gastritis symptoms.
Yes, but only when caught early — cancer confined to the stomach lining can sometimes be removed endoscopically. More advanced disease generally requires surgery, often with chemotherapy.
Diagnostic evaluation is generally covered under standard health insurance; coverage for treatment, particularly surgery and oncology care, depends on your specific policy. Our team can help clarify what's covered and coordinate with oncology partners as needed.
It's worth a specific conversation with a gastroenterologist about your individual risk and whether endoscopic evaluation makes sense, particularly if you also have other risk factors like confirmed H. pylori infection or atrophic gastritis.
Symptoms can overlap significantly, especially early on, which is exactly why persistent or unusual digestive symptoms deserve endoscopic evaluation rather than assuming they're routine gastritis — endoscopy and biopsy are what actually distinguish them.
No — atrophic gastritis increases risk and warrants periodic monitoring, but most people with it do not develop gastric cancer. It's a reason for surveillance, not a diagnosis in itself.
Further staging tests determine how advanced the disease is, which then guides a treatment plan developed with gastroenterology, surgical oncology, and medical oncology working together, tailored to the individual situation.
It's extremely rare in children. Any concerning digestive symptoms in a child are evaluated by KAGE's pediatric gastroenterology team.
Book a consultation at KAGE
Speak to a KAGE gastroenterologist about your symptoms, your diagnosis, or a second opinion.