Gastric cancer belongs to a kind of malignant tumor in digestive system, and there are some tumor markers for gastric cancer which can be referred to the diagnosis or the follow-up of prognosis. However, there are no specific tumor markers, such as the commonly used glycoantigen 724, also known as CA724, which is about 80 RMB for one item. Carcinoembryonic antigen CEA can also be used for gastric cancer surveillance, and the general test is also 60-80 yuan for one item. If there are metastatic lesions in other parts of the body, such as liver metastasis, you can also check AFP, which costs 80 RMB. If there is no diagnosis of gastric cancer, just routine physical examination, relying on tumor markers alone is not enough, because it is necessary to cooperate with other mainly gastroscopy, through gastroscopy to take the pathology to be able to confirm the diagnosis of gastric cancer.