In the clinic, the reason why patients can be found to have tumors in the stomach is often because the patient checkup or stomach discomfort when doing the examination found that the most common examination is gastroscopy and CT. judgment of benign and malignant tumors is mainly from the size, morphology and so on several aspects of the differentiation. In general, the larger the size of the tumor, the greater the possibility of malignancy, such as mesenchymal tumors, which appear in the stomach at <5cm, the possibility of malignancy is relatively small; if >5cm, the possibility of malignancy will increase significantly. Another thing is to look at the morphology of the tumor, benign tumors tend to have clearer borders and smoother mucosa. However, malignant tumors seldom have clear borders, and they often show infiltrative growth, i.e., unclear borders, and morphologically, they are uneven and bumpy. If contacted with an instrument under the endoscope, it can easily lead to bleeding. So whether the stomach tumor is benign or malignant, patients are advised to go to the hospital as early as possible for early diagnosis and treatment if symptoms appear.