Gastric MT is an abbreviation for malignant-tumor, malignant-tumor. MT is often used clinically to represent malignant tumor, to prevent patients from hearing the words malignant-tumor and to prevent increasing patients’ psychological pressure, and also to adopt the abbreviation in malignant-tumor writing for convenience. The most common malignant tumor of stomach is gastric cancer, and other rare ones are gastric lymphoma and gastric sarcoma. Therefore, there is a slight difference between gastric MT and gastric cancer, but the most common malignant tumor in the stomach is gastric cancer. The diagnosis of malignant tumor is determined by the results of gastroscopic biopsy, which can determine whether it is gastric cancer or gastric lymphoma, gastric sarcoma or other types of tumors in the stomach. Gastric cancer is preferred to surgery and gastric lymphoma is preferred to systemic chemotherapy, so gastric MT may be basically close to gastric cancer, but there are still subtle differences.