Stomach cancer is hereditary and follows both paternal and maternal lines. Stomach cancer is a malignant tumor of the stomach caused by a combination of factors. This disease has a certain genetic tendency, and epidemiological studies have found that people with the presence of family history of stomach cancer are more likely to develop stomach cancer than others. Stomach cancer is not inherited by a single paternal or maternal line, but both paternal and maternal lines may carry out inheritance. Not all stomach cancers are hereditary, and most of the patients are caused by Helicobacter pylori infection, improper diet, environmental pollution, and chronic inflammation of the stomach. The prognosis of stomach cancer is related to the clinical stage, treatment timing and other factors, generally speaking, the earlier the treatment, the higher the possibility of cure. Therefore, if you suffer from stomach cancer, you must actively cooperate with doctors for treatment.