What are the causes of gastric cancer

Gastric cancer is a common malignant tumor of the digestive system. Its incidence rate ranks first among all tumors in my country. It can occur in any age group, and its incidence rate increases with age. What are the causes of gastric cancer?

1. Genetic factors. Gastric cancer tends to be caused by a family history of heredity. The incidence of gastric cancer is very high in families with a family history of heredity, and the incidence of relatives of gastric cancer patients is 4 times higher than that of families without a family history of heredity.

2. Dietary factors: Unhealthy eating habits, such as eating too fast, overcooking food, and irregular meals, etc. These unhealthy eating habits can easily induce gastric cancer and increase the risk of human disease.

3. Immune factors: Patients with atrophic gastritis, gastric polyps or those who have undergone gastrectomy may increase the incidence of gastric cancer.

4. Geographical and environmental factors. There are obvious differences in the geographical and environmental distribution of gastric cancer. Among patients in areas with a high incidence of gastric cancer, the body's intake of selenium is lower than that of people in normal areas. This shows that geographical and environmental factors play a very important role in the incidence of gastric cancer.

5. Occupational factors: People who are exposed to sulfuric acid dust, lead, asbestos, herbicides for a long time and workers in the metal industry have a significantly increased risk of gastric cancer.