How is cancer related to family inheritance?

The current research results suggest that cancer is not a direct hereditary disease, but there are indeed a small number of cancers that tend to be clustered in families. If someone in the family has cancer, his children are several times more likely to have cancer than the average person. These cancers are called hereditary familial cancers. Including esophageal cancer, colorectal cancer, breast cancer, gastric cancer, endometrial cancer, etc. The influence of this genetic factor is called genetic susceptibility in medicine. People have gradually realized through observation that lifestyle and exposure to certain carcinogens in the environment can increase the susceptibility of the human body to cancer. It has also been found that some patients with congenital immune deficiencies have a much higher risk of cancer than normal people. For hereditary familial cancer. Those who often have defective genes are more likely to develop cancer. The most prominent hereditary manifestation is retinoblastoma, but the incidence is extremely low. A large number of clinical data have confirmed that if there are cancer patients in the family, the offspring may not necessarily suffer from cancer. In addition, very few cancer families have been found in the world. About one-third of such families have cancer successively, and the incidence of men and women is the same, and most of them suffer from the same type of cancer. Such cancer families are definitely related to heredity, but the actual In fact, there are not many such families. There are some diseases that are not cancer, but can be cancerous and are hereditary. Clinically, they are called genetic tumor syndromes. Such as familial polyposis colon, polyps can become malignant colon cancer, such patients must be vigilant and closely observed. In conclusion, the genetics of cancer is complex. The occurrence of cancer is a mystery that has not yet been fully solved. Therefore, when someone in your family is suffering from cancer, you must not think wildly, keep a happy mood, improve your immunity, learn and understand the knowledge of cancer, and help your family build up confidence in fighting cancer.