Gastric Cancer: Causes, Symptoms, Diagnosis, and Treatment

What is Gastric Cancer?
Gastric cancer, also known as stomach cancer, is a disease where malignant (cancer) cells form in the lining of the stomach. It often develops slowly over many years and may not cause noticeable symptoms in the early stages. Because of this, it’s frequently diagnosed at a more advanced stage, making early detection and awareness very important.

What Causes Gastric Cancer?
The exact cause of gastric cancer isn’t always known, but several risk factors can increase your chances of developing it:

• Infection with Helicobacter pylori (H. pylori) – a common stomach bacteria
• Chronic gastritis – long-term inflammation of the stomach lining
• Smoking
• High salt or smoked foods in the diet
• Family history of gastric cancer
• Stomach polyps
• Previous stomach surgery
• Pernicious anemia
• Obesity
• Exposure to certain chemicals in the workplace

Types of Gastric Cancer
Gastric cancer can develop in different areas and types of cells within the stomach:

• Adenocarcinoma – the most common type, starting in the mucus-producing cells
• Lymphoma – cancer of the immune cells in the stomach wall
• Gastrointestinal stromal tumor (GIST) – rare cancer of the stomach’s muscle layer
• Carcinoid tumor – slow-growing tumors from hormone-producing cells

Symptoms of Gastric Cancer
Symptoms often don’t appear until the cancer is advanced. When they do occur, they may include:

• Persistent stomach pain or discomfort
• Bloating after meals
• Feeling full quickly when eating
• Loss of appetite
• Unexplained weight loss
• Nausea or vomiting
• Heartburn or indigestion
• Blood in stool or black stools
• Fatigue or weakness

How is Gastric Cancer Diagnosed?
To confirm the diagnosis, your doctor may use several tests:

• Endoscopy – a flexible tube with a camera to view the stomach lining
• Biopsy – taking a tissue sample during endoscopy to test for cancer cells
• Imaging tests – such as CT scans, X-rays, or MRI to see if cancer has spread
• Blood tests – to check for anemia or other abnormalities
• Barium swallow – X-ray imaging after drinking a special contrast liquid

Treatment Options for Gastric Cancer
Treatment depends on the stage and location of the cancer, as well as your overall health:

• Surgery – to remove part or all of the stomach (gastrectomy)
• Chemotherapy – to kill cancer cells or shrink tumors before/after surgery
• Radiation therapy – sometimes used along with chemotherapy
• Targeted therapy – drugs that target specific cancer cell features
• Immunotherapy – helps your immune system fight cancer (used in some cases)
• Palliative care – focused on symptom relief if the cancer is too advanced for a cure

Complications of Gastric Cancer
Without treatment, gastric cancer can cause serious problems, including:

• Bleeding in the stomach
• Blockage of the stomach or intestines
• Spread to other organs such as the liver, lungs, or lymph nodes
• Severe weight loss and malnutrition

Can Gastric Cancer Be Prevented?
There’s no guaranteed way to prevent it, but these steps may lower your risk:

• Treat H. pylori infections early
• Eat a diet rich in fruits and vegetables
• Limit salty, smoked, or pickled foods
• Avoid tobacco and alcohol
• Maintain a healthy weight
• Get regular check-ups if you have a family history or risk factors

Who is at Risk for Gastric Cancer?

• People over 50 years of age
• Men are more commonly affected than women
• Those with H. pylori infections or chronic gastritis
• People with a family history of stomach cancer
• Individuals who smoke or drink alcohol regularly
• Those with poor diets high in salt and processed meats

Living with Gastric Cancer
Gastric cancer can be life-changing, but many people continue to live meaningful lives with proper care. Management may include:

• Nutrition support
• Psychological counseling
• Support groups
• Regular follow-ups with your medical team

Nutritional Tips for People with Gastric Cancer