A polyp is any visible overgrowth of tissue that projects from the mucosal surface into the lumen and can vary in its general presentation, histology and biological characteristics. Although gastric polyps are not gastric cancer, they have the possibility of malignant transformation and are a precancerous state of gastric cancer. Therefore, patients with gastric polyps should be alerted, followed up regularly and treated promptly. The incidence of gastric polyps in asymptomatic people is less than 1%. Gastric polyps can be divided into two categories: non-neoplastic polyps (including hyperplastic polyps, misshapen polyps, inflammatory polyps, ectopic polyps, etc.) and neoplastic polyps (including flat adenomas, i.e. tubular adenomas, and papillary adenomas, i.e. villous adenomas), with the former having a low chance of malignancy and the latter having a high tendency of malignancy. Inflammatory polyps do not have a tendency to become malignant; 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, these polyps can generally occur more than one, but rarely occur intestinal, the cancer rate is low, only about 1%. However, proliferative polyps can grow up to local heterogeneous hyperplasia (adenomatous changes) and can also become malignant, and the incidence of cancer in the stomach with polyps can be 7.4% to 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 mixed tubular-villous 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 a tip, the easiest and best treatment is endoscopic removal; for adenomas that cannot be removed endoscopically, the stomach should be cut open for adenomectomy, and more mucosal biopsies should be taken from the adjacent area to observe the presence of heterogeneous hyperplasia or obvious cancer. Patients with familial polyposis and Gardner syndrome may also have multiple fundic polyps, gastric adenomas, and duodenal adenomas in the stomach, and the incidence of cancer in these adenomas is similar to that of disseminated gastric adenomas. Gastric polyps are not gastric cancer, but they have the potential to become malignant and are a precancerous state of gastric cancer. Therefore, patients with gastric polyps should be alerted, followed up regularly and treated promptly. A polyp is any visible overgrowth of tissue protruding from the mucosal surface into the lumen, and its general presentation, tissue structure and biological properties can vary. 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, ectopic polyps, etc.) and neoplastic polyps (including flat adenomas, i.e., tubular adenomas, and papillary adenomas, i.e., villous adenomas), with the former having a low chance of malignant transformation and the latter having a high tendency to malignant transformation.