Stomach cancer is the most common malignant tumor of digestive system in human body. The incidence rate has been increasing in recent years, and there is a trend of younger age
Therefore, early detection of gastric cancer is imperative. Therefore, early detection of gastric cancer is imperative. 70% of gastric cancer patients have no clinical manifestations or physical signs in early stage. In the middle and late stages, abdominal pain, abdominal distension, anemia, nausea and vomiting, even vomiting blood, black stool and abdominal masses will appear. At this point, further treatment is often less effective and the quality of life is not high. Therefore, we suggest that those who present with one of the following manifestations should be promptly consulted to clarify the cause and promptly treated:1. Patients over 40 years of age who begin to experience discomfort or pain in the upper and middle abdomen without obvious rhythmicity and accompanied by lack of appetite and elimination of C, 2. Patients with gastric ulcer who do not improve with strict medical treatment, 3. Chronic atrophic gastritis with intestinalization and mild atypical hyperplasia, 4. Gastric polyps larger than 2 cm in diameter, 5. Patients above middle age with unexplained anemia, wasting and persistent positive fecal occult blood.