Stomach (Gastric) Cancer

Overview

Stomach (gastric) cancer develops when cells in the lining of the stomach grow abnormally. Most are adenocarcinomas arising from the mucus-producing cells of the stomach wall, and they often develop slowly over years, sometimes after long-standing inflammation. Less common types include lymphomas, gastrointestinal stromal tumours (GISTs) and neuroendocrine tumours.

Because early stomach cancer often causes vague symptoms, it can be found at a later stage, which makes coordinated, specialist care important. Treatment usually combines surgery with chemotherapy, and sometimes targeted therapy, immunotherapy or radiotherapy, guided by a multidisciplinary team.

This page is an educational overview only and is not medical advice. Diagnosis and treatment must be arranged with a qualified oncology and surgical team, and no outcome can be guaranteed.

Who May Need This

Assessment may be needed by people with persistent indigestion or heartburn, upper abdominal pain, feeling full quickly when eating, nausea, unexplained weight loss, tiredness from anaemia, or difficulty swallowing. Vomiting blood or passing black stools needs prompt evaluation.

Risk is higher with long-term Helicobacter pylori infection, chronic gastritis, a diet high in salted or smoked foods, smoking, obesity, previous stomach surgery, and certain inherited conditions. Persistent upper digestive symptoms, especially in older adults, should be assessed by a doctor rather than treated only with over-the-counter remedies.

When It May Be Recommended

Surgery is generally recommended when the cancer is confined to the stomach and nearby lymph nodes and can be removed, and the patient is fit for a major operation. For many cancers, chemotherapy before and after surgery is recommended to improve outcomes. Very early cancers limited to the stomach lining may sometimes be removed endoscopically.

When the cancer has spread widely, treatment focuses on controlling the disease and relieving symptoms such as obstruction, bleeding or difficulty eating. The recommendation depends on the stage, tumour markers and the person's overall health, and is made by the multidisciplinary team.

Diagnosis and Evaluation

Diagnosis usually begins with an endoscopy (gastroscopy), in which a camera examines the stomach and takes biopsies. Staging then uses CT scans, often endoscopic ultrasound to judge how deep the tumour goes, and sometimes PET-CT or a diagnostic laparoscopy to check for spread within the abdomen.

Biopsies are also tested for markers such as HER2 and others that guide targeted or immunotherapy. Blood tests assess anaemia and nutrition. All results are reviewed by the multidisciplinary team, and a second opinion can be valuable before committing to treatment.

Treatment Options

The main treatment for localised disease is surgery (gastrectomy) to remove part or all of the stomach with nearby lymph nodes, usually combined with chemotherapy before and after. Very early, superficial cancers may be treated with endoscopic resection without removing the stomach.

Depending on the tumour's markers and stage, targeted therapy (for example against HER2), immunotherapy, and radiotherapy may be added. For advanced disease, chemotherapy and targeted or immune treatments, along with procedures to relieve obstruction or bleeding, are used to control symptoms. The plan is individualised.

How It Is Performed

A gastrectomy is performed under general anaesthesia, either through open surgery or with minimally invasive (laparoscopic or robotic) techniques in suitable cases. The surgeon removes part or all of the stomach along with the surrounding lymph nodes, then reconnects the remaining digestive tract so food can pass into the small intestine.

The removed tissue is examined to confirm the type, stage and whether the margins are clear, which guides further treatment. These are major operations, usually followed by a stay in a high-dependency area and a gradual reintroduction of food. Outcomes are better in high-volume specialist centres.

Preparation

Preparation includes completing staging tests, improving nutrition (sometimes with supplements or feeding support before surgery), and treating anaemia. Your team reviews medicines, especially blood thinners, and gives fasting instructions. Stopping smoking and improving fitness beforehand support recovery from major surgery.

If you are travelling for treatment, bring all imaging, endoscopy and biopsy results, including marker testing. Plan an in-country stay covering surgery, initial recovery and early follow-up, arrange a companion, and organise continuing oncology and dietetic care with your home team.

Benefits and Expected Goals

When the cancer can be completely removed, the goal of surgery combined with chemotherapy is to give the best available chance of long-term control or cure. Relieving obstruction or bleeding and supporting nutrition can improve comfort and the ability to eat, and targeted and immune therapies can help control certain cancers.

Benefits depend on the stage, tumour biology and response, and cannot be guaranteed. Your team can explain the realistic goals for your situation — whether cure-directed or focused on control and quality of life — and how you will be monitored afterwards.

Risks and Possible Complications

Stomach surgery is major surgery and carries real risks that the team works to reduce.

• Leakage from the surgical join (anastomotic leak)
• Bleeding, infection or blood clots after surgery
• Difficulty eating, early fullness, weight loss and dumping syndrome
• Vitamin and mineral deficiencies, including vitamin B12 after total gastrectomy
• Chemotherapy or targeted therapy side effects, and the possibility of recurrence

Your team will explain the risks specific to your operation and treatment. Report severe pain, fever, vomiting or wound problems promptly after surgery.

Recovery, Follow-up & Aftercare

Recovery from a gastrectomy usually involves a hospital stay of one to two weeks and several weeks to months to adjust to a new way of eating. Smaller, more frequent meals, dietitian support, and vitamin and mineral supplements (including B12 injections after total gastrectomy) help you adapt. Strength returns gradually.

Follow-up includes clinic reviews, scans, and any planned chemotherapy or targeted therapy. Nutritional monitoring is important long term. If you were treated abroad, ensure your home team has the operation and pathology details and can provide ongoing dietetic and oncology follow-up.

Medical Tourism Planning

Choose a JCI- or ISO-accredited hospital with an upper gastrointestinal or surgical oncology programme, experienced gastric surgeons, and access to medical oncology, dietetics and intensive care. Ask about the centre's case volume and how it manages complications such as leaks.

Plan an in-country stay covering surgery and early recovery, request a written treatment plan and cost estimate, and arrange continuing chemotherapy, dietetic support and follow-up with your home team. Carry your pathology and marker results and consider medical travel insurance.

Estimated Cost Factors

Cost depends on the type of surgery (open, laparoscopic or robotic), the length of hospital and intensive care stay, and whether chemotherapy, targeted therapy, immunotherapy or radiotherapy are needed. Staging scans, marker testing, nutritional support and management of complications also affect the total.

Many destinations offer this treatment at a fraction of typical US prices, but costs vary widely by case and cannot be judged from online figures. Always request a personalized written quote detailing what is included before deciding.

Choosing a Hospital or Specialist

Look for a hospital with recognised accreditation, an upper gastrointestinal cancer multidisciplinary team, experienced surgeons, and specialised pathology and marker testing. Confirm access to medical oncology, dietetics and intensive care in the same centre.

Ask about international patient services, interpreter support, and how follow-up, nutritional care and any further treatment would be coordinated with your home doctors. Written treatment and cost plans are signs of a quality programme.

Alternatives

When surgery is not appropriate, alternatives include chemotherapy, targeted therapy or immunotherapy for suitable cancers, and radiotherapy in selected cases. Procedures such as stenting or bypass surgery can relieve a blockage, and very early cancers may be treated by endoscopic resection.

Best supportive and palliative care focused on nutrition, comfort and symptom control is important in advanced disease, alone or alongside active treatment. Clinical trials may offer newer options. Discuss all approaches with your team so the plan fits the stage and your priorities.

Questions to Ask Your Doctor

• What type and stage of stomach cancer do I have, and is it removable?
• Will I have chemotherapy before and after surgery, and any targeted or immune therapy?
• Which operation would I need, partial or total gastrectomy?
• How will my eating and nutrition be affected, and what support is available?
• What are the specific risks of my surgery and treatment?
• What are the realistic goals of treatment for my situation?
• How long should I stay in-country, and what follow-up will I need at home?
• What is included in the written cost estimate?