Early stage gastric cancer is mostly asymptomatic or with only mild symptoms. When the clinical symptoms are obvious, the disease is already in advanced stage. Therefore, we should be very alert to the early symptoms of gastric cancer to avoid delaying the diagnosis and treatment. The so-called pre-cancerous changes refer to certain lesions with strong malignant tendency, which may develop into gastric cancer if left untreated. Pre-cancerous changes include precancerous conditions and precancerous lesions. Wang Jianqiang, Department of Oncology, Siping Central Hospital