Cancer is all around us
Probably because the profession is a doctor, it is particularly sensitive to the words of health and disease, and the most diseases that appear are about cancer and tumors.
This situation is directly related to people's health attention and the improvement of medical level, such as due to the popularity of CT, so that lung CT is used as a physical examination item during physical examination, so that most lung cancers can be detected at an early stage; the popularity of gastrointestinal endoscopy makes the early detection of gastric cancer and bowel cancer a reality.
So how much cancer is there? At present, China's statistics are that the annual cancer incidence is about 200-300/100,000, that is, about 0.2-0.3%, which can also be explained as saying that about 2 to 3 out of 1,000 people will be found to have cancer every year.
So we often hear about whoever is who, or who knows someone who has cancer, and if your work is related to medical treatment, or if your friends or family members are medical workers, then cancer will hear more than others.
Many people know that cancer is an incurable disease, so once it is possible to sentence to death, but due to the development of medicine, people's understanding of cancer is gradually changing. Often heard
Many people are worried about this problem, especially when they come into contact with cancer patients, or even eat together, whether they can be infected. ，
This problem should be clear, cancer is not transmitted from person to person, but cancer can metastasize in the patient's body.
Some people may ask why some people have cancer, several people in a family have cancer, and the previous paragraph reported that four out of five brothers had cancer.
Others will ask why there are so many people in the same area who have the same cancer, and doesn't that mean that cancer is contagious?
How many people in a family get the same cancer?
Generally speaking, this is related to the inheritance of cancer, and cancer is also related to other factors, such as living in the same environment, having the same carcinogenic factors, the same eating habits, and the chance of getting the same cancer is greatly increased.
Genetic factors can explain that several people in a family have cancer, and the eating habits and living habits of everyone in this family may be the same, resulting in an increase in the chance of getting sick.
People in the same area, such as areas that receive pollution, may have lung cancer or many people have esophageal cancer, which indicates that the occurrence of cancer is related to environmental factors, and the common living environment and drinking water and diet are not much different.
Therefore, the occurrence of cancer can now be determined to be related to genetic factors, eating habits, and environmental factors.
At the same time, it is now determined that there are biological factors, such as viruses, in which Epstein-Barr virus can cause nasopharyngeal cancer. Cancer is also related to radiation factors and chemical factors, such as chemicals in the air, such as benzene, which are prone to skin cancer and lung cancer.
Biological factors of cancer occurrence should still be paid attention to
We all know that biological factors are to some extent that can lead to the occurrence of cancer.
For example, EBV is related to the occurrence of nasopharyngeal cancer, the probability of liver cancer in hepatitis B patients is much higher than that of people who are not infected with hepatitis B virus, and helicobacter pylori infection increases the incidence of gastric cancer.
So does it mean that cancer can be contagious? Of course not, because after being infected with these viruses and bacteria, cancer does not necessarily occur, it is viruses and bacteria that are infected, not cancer.
However, for these viruses and bacteria, we still have to pay attention to, take hepatitis B virus, it can be transmitted through mother-to-child transmission, blood transfusion transmission, iatrogenic transmission and sexual transmission, as well as close contact transmission.
The close life contact transmission method is not something that can be transmitted by shaking hands and eating together.
Mainly hepatitis B patients have infectious body fluids, including saliva, tears, sweat, milk, semen, endocrine fluids, blood, etc. However, if the skin membrane is damaged in life, and then contaminated with body fluids containing hepatitis B virus, it may infect hepatitis B.
Therefore, it is still necessary to pay attention to the biological factors of cancer.