Gastric polyps are not stomach cancer, but they have the potential to become malignant. It is a precancerous state of gastric cancer. Therefore, patients suffering from gastric polyps should be alerted, followed up regularly and treated promptly. A polyp is any visible overgrowth of tissue that projects from the mucosal surface into the lumen and varies in its general presentation, histological structure and biological properties. The incidence of gastric polyps in asymptomatic individuals is less than 1%. Gastric polyps can be divided into two categories: non-neoplastic polyps (including hyperplastic polyps, malignant polyps, inflammatory polyps, and ectopic polyps), which have a low chance of malignancy, and neoplastic polyps (including flat adenomas, i.e., tubular adenomas, and papillary adenomas, i.e., villous adenomas), which have a high propensity for malignant transformation. Inflammatory polyps do not have a tendency to become malignant, and misshapen and ectopic polyps are rarely carcinogenic. Proliferative (regenerative) polyps are composed of hyperplastic gastric concave epithelium and intrinsic glands with well-differentiated cells, sometimes accompanied by interstitial hyperplasia and disorganized smooth muscle bundles, which can generally occur more than one, but seldom occur intestinal, and the cancer rate is low, only about 1%. However, when proliferative polyps grow up, local heterogeneous hyperplasia (adenomatous changes) can occur, and malignant changes can also occur, and the incidence of cancer in the stomach with polyps can be 7.4%~13%, so the whole stomach should be carefully examined when gastric polyps are found. Adenomatous polyps are true tumors, accounting for 10%-25% of gastric polyps, the incidence of which increases with age and is more common in men than in women (2:1), preferably in the gastric sinus. Most of them are flat adenomas without a wide base or with thick and short tissues, less often with tissues or papillae (villous). The histological classification (according to WHO typing) can be divided into tubular, papillary (villous) and tubular-villous hybrid types, which are often accompanied by obvious intestinalization and different degrees of heterogeneous hyperplasia. The cancer rate is very high, reaching about 40%. The carcinoma rate is especially high for villous adenomas. In general, when the diameter of polyps exceeds 2 cm, malignant transformation is required. Nagayo, a Japanese scholar, classifies adenomatous polyps as junctional lesions and believes that it is sometimes difficult to determine their benignity or malignancy based on clinical and histological examination alone, and long-term follow-up is needed to make a conclusion. Likewise, it should be noted that coexisting gastric cancer is common, therefore, when adenomatous polyp lesions are found, careful search for coexisting gastric cancer in other areas should be performed, and cases after polyp removal should still be followed up with annual gastroscopy. For most polyps with tips, the easiest and best treatment is endoscopic removal: for adenomas that cannot be removed endoscopically, gastroscopic submucosal dissection (ESD) should be performed and more mucosal biopsies should be taken from the adjacent area to observe the presence of heterogeneous hyperplasia or obvious carcinoma. Patients with familial colorectal polyposis and Gardner syndrome may also have multiple fundic gland polyps, gastric adenomas and duodenal adenomas in the stomach, and the incidence of carcinoma in these adenomas is similar to that of disseminated gastric adenomas.