In the daily metabolism process, more than 654.38+0 billion new cells will grow, and 654.38+0-20 "cancer cells" will also grow.

Because every time in the process of human renewal, there will be "mistakes" in DNA replication, which will lead to gene mutation. Everyone has more or less cells with genetic mutations. These abnormal cells may develop into cancer cells.

Relax! It is normal for human cells to make mistakes occasionally, because there are thousands of cells in the human body, and the cell base is so large. In the process of segmentation and copying, there will always be opportunities for mistakes.

In short, everyone can get cancer.

Definition and pathogenesis of cancer

In medicine, cancer refers to malignant tumor originating from epithelial tissue, which is the second largest disease after cardiovascular disease in morbidity and mortality. The source of cancer is the variation of cells. Different from normal cells, cancer cells have the characteristics of infinite proliferation (uncontrolled division), transformation and easy metastasis, which can destroy normal cells.

According to the Global Cancer Statistics 20 18 published by the American Cancer Society, in 20 18, there were 9.6 million cancer cases and 9.6 million deaths worldwide, including 3.804 million cancer cases and 2.296 million cancer deaths in China, ranking first in the world. In the global 100 new patients,

The highest incidence of new cancer in the world is lung cancer (1 1.6%), breast cancer (1 1.6%), colorectal cancer (10.2%) and prostate cancer (7.1. The cancers with the highest mortality in the world are lung cancer (18.4%), colorectal cancer (9.2%), gastric cancer (8.2%), liver cancer (8.2%) and breast cancer (6.6%). middle

2. Factors affecting cancer

Environmental pollution, smoking and drinking, radiation exposure, virus infection, lack of exercise, improper diet, lifestyle (smoking and drinking, lack of exercise, obesity or overweight, staying up late and other bad habits), psychological factors (long-term listlessness, being in negative emotions), drug abuse (especially long-term heavy use), genetic factors, etc.

3. Not having cancer does not mean that the probability of getting cancer is zero.

In fact, everyone has "cancer cells" in their bodies. When more than 1000 billion cells grow in daily metabolism, the inevitable DNA replication will go wrong, leading to gene mutation, and precancerous cells are likely to appear in the mutated cells. Although everyone produces precancerous cells, they rarely develop into malignant tumors, and most abnormal cells will be repaired, corrected or destroyed by the immune system, thus ensuring the dynamic balance of various cell functions in the body.

4. Why are there cancer cells but no cancer?

Thanks to our immune system. Human immunity mainly depends on white blood cells, also known as white blood cells. Its function is to protect the body from pathogens (bacteria and viruses), cancer cells and foreign bodies, and it is the guardian of the human body. The mutated cells are "bad molecules". If they are not eliminated, with the cooperation of internal and external factors, they may develop into cancer cells and be regarded as enemies. Under normal circumstances, the human immune system has been monitoring and destroying these abnormal molecules.

The main functions of this process are:

1. Cancer cells (abnormal cells) are monitored and acted by human immune system. T cells take the initiative to contact and adhere to cancer cells, and use their enzymes to change the permeability of cancer cell membranes, resulting in a large number of potassium ions flowing out of cancer cells, and a large number of sodium, calcium ions and water being injected, which makes cancer cells lose osmotic balance and be eliminated; B cells are also involved in the fight against cancer. They can synthesize a special antibody-immunoglobulin, which is distributed in body fluids, forming an immune battlefield and destroying and killing cancer cells.

5. Why do cancer cells get cancer after being systematically eliminated?

When the body's immunity drops, resulting in cancer cells can not be eliminated in time, a large number of reproduction, the body's immune system will be destroyed. Cancer cells are out of control, causing great harm to human body.

6. How to prevent and treat cancer (physical examination and early treatment of cancer)

For cancer, the best prevention and treatment method is to carry out accurate unconventional physical examination, early prevention and early treatment.

Cancer cells are very small, and the accuracy of detection instruments is very high. The general routine physical examination is to check for cancer. Japan's physical examination is world-famous, especially in cancer screening, which can find and check a variety of known early and early cancers, and maintain a world-leading record in cancer prevention and inspection. It can find most of the possible early cancers in millimeter and micron scales below 10mm, while China can only detect those in centimeter scale. In addition, Japan not only has excellent oncologists, but also has the world's top anti-cancer technology and equipment. In Japan, 80% of cancers are found at an early stage, and 80% of them can be cured. It can be said that Japan's cancer prevention rate is the world's leading! Experts remind that it is best to do cancer screening once a year, which is also conducive to a deeper understanding of your physical condition.

7. Tips for preventing cancer in daily life

Anti-cancer advice:

1, reasonable diet. Choose foods with high antioxidant content and strong anticancer effect. For example, dark fruits and vegetables rich in vitamin A-carrots, broccoli, spinach, red sweet potatoes and so on. Foods rich in vitamin c-seabuckthorn, kiwi fruit, jujube, etc. Foods rich in vitamin e-nuts, beans, etc. ; Foods rich in selenium-sea cucumbers, oysters, clams, etc. Be careful not to eat too much salt, you need to eat more fruits and don't overeat.

2. Change the unhealthy lifestyle. Quit smoking, drink less, reduce sun exposure, eat less junk food, improve cooking methods and avoid burnt food.

3. Maintain an ideal weight and a regular life, and exercise reasonably every day.

What I want to tell you about health here is that I believe that with the rapid development of medical technology and the sharing of quality medical care around the world, the incidence and mortality of cancer will be controlled, and everyone can stay away from cancer and have a healthy body.