After the diagnosis of gastric cancer, according to different clinical stages, the treatment programs are different, so the survival time is also obviously different. For early gastric cancer, the lesions are located in the mucosa and submucosa, if early surgical treatment is carried out, the survival time of 5-year survival rate can reach more than 50%. For advanced stage patients, if the diagnosis is confirmed, there is already extensive metastasis in the abdominal cavity or distant metastasis, in this case, it is not suitable for surgical treatment, and the patient will also show obvious malignant consumption state. In this period, symptomatic nutritional support therapy can be given, and the survival time ranges from 3-6 months, and the survival time of patients with gastric cancer is also obviously different, which is also related to the biological behavior of the tumor and the individual's physique and other factors.

The prevention of gastric cancer is mainly reflected in the following aspects: First, for gastric cancer prevention, it is recommended that patients must have regular body checkups and gastroscopy, and if lesions or abnormalities are found in gastric mucosa, biopsy of lesion tissues should be taken to do pathological examination, so as to clarify the nature of lesions and carry out targeted treatment. Second, it is recommended that patients must develop good dietary habits, avoid smoking, alcoholism, do not eat spicy, greasy, stimulating food. Third, to exercise properly, maintain a regular routine, enhance their own immunity, maintain optimistic mood, to prevent excessive mental stress. Fourth, but also the main stomach benign diseases, such as gastric atrophic gastritis, gastric tumor polyps and other lesions, to prevent the possibility of cancer.