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Stomach (Gastric) Cancer: Everything You Need to Know

Stomach cancer, or gastric cancer, is a serious illness that impacts the lining of the stomach. It is among the most prevalent types of cancer globally and can be life-threatening if not caught early.  Unfortunately, stomach cancer often goes undetected in its early stages because symptoms can be mild or mistaken for common digestive issues.

In this blog, we’ll explain everything you need to know about stomach cancer—its causes, symptoms, diagnosis, and treatment—so you can stay informed and take proactive steps for your health.

What is Stomach Cancer?

Stomach cancer happens when abnormal cells grow uncontrollably in the stomach, forming tumors. If not treated, these cancerous cells can spread to other body parts. The most common type of stomach cancer is adenocarcinoma, which accounts for about 90% of cases.

What Causes Stomach Cancer?

There’s no single cause of stomach cancer, but several factors can increase your risk:

H. pylori Infection—This is a common bacterial infection that can lead to chronic inflammation and ulcers, increasing the risk of stomach cancer.

Unhealthy Diet – Overeating salty, smoked, or processed food while not consuming enough fresh fruits and vegetables can raise your risk.

Genetics & Family History – If stomach cancer runs in your family, you may be at higher risk.

Smoking & Alcohol – Tobacco and excessive alcohol consumption damage the stomach lining and contribute to cancer development.

Obesity – Being overweight is associated with a higher risk of developing stomach cancer.

Age & Gender – Stomach cancer is more common in people over 50 and affects men more often than women.

Previous Stomach Surgery or Conditions—Your risk may be higher if you’ve had stomach surgery, ulcers, or chronic inflammation.

Recognizing the Symptoms

Stomach cancer symptoms can be subtle and easy to dismiss as common digestive problems. Here are some warning signs to watch for:

Frequent indigestion or heartburn

Ongoing stomach pain or discomfort

Unexplained weight loss

Loss of appetite or a sensation of fullness after consuming small portions

Nausea or vomiting (sometimes with blood)

Dark, sticky stools (indicating internal bleeding)

Fatigue or weakness

If you notice these symptoms persisting, don’t ignore them. It’s always best to check with a doctor.

How is Stomach Cancer Diagnosed?

Detecting stomach cancer early makes a big difference in treatment success. Doctors may use several tests to diagnose the disease:

Endoscopy (EGD) – A thin, flexible tube with a small camera is inserted down your throat to examine your stomach.

Biopsy – A small tissue sample is taken and tested for cancer if something suspicious is found during an endoscopy.

Imaging Tests – CT scans, X-rays, and MRIs help doctors see if cancer has spread.

Blood Tests – Checking for anemia or tumor markers can help with diagnosis.

Treatment Options for Stomach Cancer

The type of treatment you receive for cancer will depend on how advanced the cancer is, your general health, and what you prefer. Some common options for treatment include:

Surgery – Removing part or all of the stomach to eliminate cancerous cells.

Chemotherapy – Using powerful drugs to kill cancer cells, often combined with other treatments.

Radiation Therapy – Targeting and destroying cancer cells with high-energy rays.

Targeted Therapy – Using specialized drugs to attack cancer at a molecular level.

Immunotherapy – Boosting your body’s immune system to help fight cancer.

How to Lower Your Risk

Although stomach cancer can't always be avoided, you can lower your chances of developing it by making healthier choices in your daily life.

Eat a diet rich in fresh fruits and vegetables.

Limit processed, salty, and smoked foods.

Quit smoking and limit alcohol consumption.

Get checked regularly if you have a family history of stomach cancer.

Treat H. pylori infections early.

Maintain a healthy weight and stay physically active.

Final Thoughts

Stomach cancer is a serious but potentially preventable disease. Awareness of the risk factors, recognizing early symptoms, and seeking medical help can make all the difference. If you’re experiencing persistent stomach issues, don’t hesitate to consult a healthcare professional. By making smart lifestyle choices and staying informed, you can take control of your health and reduce your risk of stomach cancer. Finding problems early and getting the proper care quickly leads to better results.

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