Stomach Cancer (Gastric Cancer)

Personalised treatments designed to fight cancer while minimising side effects.

What is Stomach (Gastric) Cancer?

Stomach cancer, also known as gastric cancer, begins when malignant (cancerous) cells form in the inner lining of the stomach. Over time, these cells can grow into a tumour and spread deeper into the stomach wall and to nearby organs. Most stomach cancers develop from the glandular cells of the stomach lining, and are called adenocarcinomas.

How Common is Stomach Cancer in Singapore?

According to GLOBOCAN 2020, stomach cancer is among the top 15 most common cancers in Singapore, with an estimated 1,546 new cases and 1,169 deaths each year. It is more commonly diagnosed in men compared to women, and often detected at advanced stages due to its vague and non-specific symptoms.

What Are the Signs and Symptoms of Stomach Cancer?

Early stages of stomach cancer may not cause clear symptoms, which makes detection difficult. As the disease progresses, patients may experience:

If these symptoms persist, medical evaluation is important.

Screening and Early Detection

Unlike breast or colorectal cancer, there is currently no national screening programme for stomach cancer in Singapore. However, early detection is possible through gastroscopy (endoscopy), particularly for people at higher risk, such as those with:

  • A family history of gastric cancer
  • Chronic H. pylori infection
  • Stomach polyps or chronic gastritis
  • Diets high in smoked, salted, or pickled foods

For high-risk individuals, regular monitoring and early medical consultation are recommended. Detecting stomach cancer early offers the best chance for successful treatment.

How is Stomach Cancer Diagnosed?

Diagnosis usually involves a combination of:
Gastroscopy (endoscopy)
A thin, flexible tube with a camera is gently passed through the mouth into the stomach to view the stomach lining for any abnormalities and take biopsies from suspicious areas

Tissue samples are examined under a microscope to confirm cancer

CT scans, PET scans, and ultrasounds help assess the extent of the disease

To check overall health and detect tumour markers

Early diagnosis can improve treatment outcomes.

What Are the Causes and Risk Factors?

Several factors increase the risk of developing stomach cancer:

  • Helicobacter pylori (H. pylori) infection – a common bacterial infection linked to stomach ulcers and cancer
  • Dietary factors – high intake of salted, smoked, or pickled foods
  • Smoking and alcohol consumption
  • Family history of gastric cancer
  • Chronic gastritis or stomach polyps
  • Older age and male gender (Stomach cancer is more common in older adults and tends to occur more frequently in men)

What Are the Types of Stomach Cancer?

There are several types of stomach cancer, depending on the type of cells where the cancer begins.

Adenocarcinoma (most common)
  • Accounts for more than 90% of all stomach cancers
  • Arises from the glandular cells of the stomach lining
  • A cancer of the immune (lymphatic) tissue in the stomach
  • Some types are linked to H. pylori infection
Develop from the connective (supporting) tissue of the stomach wall
Arise from hormone-producing cells in the stomach

What Are The Stages of Stomach Cancer?

Staging describes how far the cancer has spread:

Stage I

Cancer is limited to the stomach lining or wall

Cancer has grown deeper into the stomach wall and may involve nearby lymph nodes

Cancer has spread to distant organs (such as the liver, lungs, or bones)

What are Stomach Cancer Treatments?

Treatment depends on the stage, type, and overall health of the patient. At OncoCare Singapore, options include:

Surgery

Removal of part or all of the stomach (gastrectomy) for curative intent.

Radiotherapy

High-energy rays to kill cancer cells, sometimes combined with chemotherapy.
Every patient’s treatment plan is carefully tailored to their needs, with the goal of achieving the best possible outcomes while preserving quality of life.

Meet Our Doctors

At OncoCare Singapore, our multidisciplinary team brings together oncologists specialising in stomach and gastrointestinal cancers, upper GI surgeons skilled in minimally invasive procedures, radiation oncologists, radiologists and pathologists, supported by oncology nurses, dietitians, psycho-oncology counsellors and physiotherapists — working together to deliver comprehensive, personalised care for every patient.

Senior Medical Oncologist
Senior Medical Oncologist
Senior Medical Oncologist
Senior Medical Oncologist
Senior Medical Oncologist
Senior Medical Oncologist
Senior Medical Oncologist
Senior Medical Oncologist
Senior Medical Oncologist