The occurrence of cancer is a comprehensive result, so cancer has a certain chance of inheritance, for example, the chance of children having malignant tumors will increase if their parents have malignant tumors, but it is not certain that all of them will have malignant tumors. However, it is not certain that all of them will get malignant tumor. Because cancer is also a comprehensive result, it may be related to other environmental factors, virus infection, diet and genetic mutation, etc. Cancer may be mainly related to genetic mutation. In clinical practice, we can see that many tumors have family and geographical clusters, such as a large family with many people having esophageal, stomach and colon cancers. For example, in one large family, many people have esophageal cancer, stomach cancer and colon cancer. In addition, the mother may have breast cancer and the daughter may also have breast cancer or ovarian cancer. Therefore, if you have a family history of tumor, you should pay more attention and have regular screening.