Whether a 0.2 cm polyp in the posterior wall of the upper stomach is serious depends largely on whether the pathologic findings after polypectomy are benign or malignant. If the pathologic result is benign, it usually indicates that the situation is not serious. If the pathologic result is malignant, it indicates a relatively serious condition. 1. Less serious cases: Generally benign gastric polyps are more common. Usually, polyps can be removed by gastroscopy and pathologic examination is performed after removal. If the pathology result is benign, it indicates that the condition is not serious and the lesion will not have infiltration and metastasis. However, gastroscopy must be reviewed periodically. Once polyps are found again, they should be removed in time to avoid prolonged cancerous transformation. 2. More serious situation: if the pathological result is malignant, it indicates the existence of gastric cancer, which is a more serious situation. However, since polyps of 0.2 to 0.3 centimeters are very small, even if they are malignant, they usually belong to early cancer. Therefore, don’t be too alarmed. Most of them can be cured by endoscopic resection. After surgery, they are treated with chemotherapy and other treatments. Therefore, patients are advised to go to the hospital for diagnosis in time, to clarify the cause of the disease, to target the treatment, and to undergo regular review.