Is gastric cancer contagious?

Written by Ren Zheng Xin

Gastroenterology

Updated on January 03, 2025

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Gastric cancer is a malignant tumor occurring in the epithelial cells of the gastric mucosa. It is non-contagious. Currently, the incidence of gastric cancer is relatively high, primarily due to Helicobacter pylori infection, adverse environmental factors, and dietary irritants. Genetic factors also play a significant role, with 10% of gastric cancer patients having a family history. Those with a family history of gastric cancer have an incidence rate that is 2 to 3 times higher than the general population. Additionally, precancerous lesions can also induce gastric cancer, such as intestinal metaplasia, gastric polyps, residual gastritis, and gastric ulcers. Typical symptoms include indigestion, anemia, lack of appetite, aversion to food, and fatigue. Currently, gastroscopy combined with mucosal biopsy is the most reliable diagnostic method.

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early symptoms of gastric cancer

The early symptoms of gastric cancer are similar to those of some gastrointestinal diseases such as gastritis, gastric ulcers, or duodenal ulcers. They don't have very specific clinical manifestations. Common symptoms include nausea, vomiting, discomfort or pain in the upper abdomen, and acid reflux-like symptoms, which are early symptoms in patients with gastric cancer. Therefore, when such symptoms appear, it is essential to seek medical attention promptly and undergo a thorough gastroscopy.

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How is stomach cancer treated?

The treatment for gastric cancer now includes surgery, radiotherapy, chemotherapy, targeted therapy, and immunotherapy, among others. The specific treatment plan is formulated based on various factors such as the staging of the cancer, the patient's overall condition, and the presence of any underlying diseases, which are all taken into consideration before deciding on a treatment plan. For patients in the early stages who are generally in good condition, surgical resection can be evaluated and is primarily curative. Post-operative treatment decisions, such as whether to pursue adjuvant radiotherapy or chemotherapy, depend on the pathology results and the presence of high-risk factors for recurrence. For patients in advanced stages who are found to have distant metastases upon diagnosis, treatment is primarily chemotherapy. Additionally, there are broad-spectrum targeted therapies against angiogenesis, such as apatinib, which are suitable for patients with advanced gastric cancer or those who do not respond well to chemotherapy, serving as a secondary or tertiary line of treatment. These are some of the treatment methods for gastric cancer. It is crucial that the use of any medication is conducted under the guidance of a doctor.

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Can stomach cancer be cured? Can stomach cancer be cured?

Early-stage gastric cancer patients can undergo curative surgery, and then decide whether postoperative adjuvant radiochemotherapy is needed based on the specific pathological type and the presence of high-risk recurrence factors. Through these treatments, a cure can be achieved. Generally, if there is no recurrence or metastasis within five years, it is considered cured. For example, patients in stage IA, even without adjuvant chemotherapy, have a relatively high five-year survival rate, generally above 90% after curative surgery. However, if it is found to be advanced-stage, such as initial detection showing distant metastases to the liver, lungs, etc., these patients are primarily treated with systemic chemotherapy or symptomatic palliative care. In such cases, a cure is not achievable. Therefore, whether a cure is possible depends on the stage of gastric cancer and factors such as the patient's basic physical condition.

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How is gastric cancer treated?

The treatment methods for gastric cancer include surgery, chemotherapy, and radiotherapy, as well as broad-spectrum targeted therapies against angiogenesis, such as apatinib. Immunotherapy is also an option. However, the specific treatment plan is based on a comprehensive consideration of various factors, including the stage of the cancer and the general condition of the patient. The principle is that for early-stage gastric cancer patients, if the surgeon assesses that surgery is feasible, then radical surgical treatment is primarily used. For advanced-stage patients who are in generally good condition, chemotherapy is the main treatment, combined with a consideration of whether to undergo radiotherapy. For those in very advanced stages, who may not be in good health or those who have had chemotherapy with poor results, anti-angiogenic drugs like apatinib can be chosen as a subsequent treatment.

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Mid-stage symptoms of gastric cancer

Symptoms of mid-stage gastric cancer can include nausea, vomiting, poor appetite, decreased food intake, and upper abdominal pain, as well as symptoms related to the digestive tract. Some patients may also experience black stool or even vomiting blood, which are symptoms of upper gastrointestinal bleeding. Additionally, there can be bloating and abdominal pain. If the tumor is located near the pylorus and causes pyloric obstruction, clinical symptoms will include vomiting, vomiting of overnight food, and resulting in gastric retention. This can lead to significant symptoms such as abdominal pain, bloating, acid reflux, and nausea.