Cancer is actually an ancient disease.
Recently, pathological archaeologists found that cancer can actually be traced back to animal fossils in the early Mesozoic, which means that the first cancer case actually occurred 240 million years ago.
The earliest animal with cancer looks like the picture below. It is not a lizard, but the ancestor of a turtle. What a pity! Tortoise began to get cancer even before it evolved its shell.
Cancer, an ancient disease, has not been spared by most living things, and certainly not by humans.
Archaeologists have found traces of bone cancer on the skulls of ancient humans. Many mummies in Egypt have seen the scars left by cancer on bones, but they also found that the incidence of mummies is very low.
This is not because the ancient Egyptians maintained it properly, but because cancer is actually a senile disease. The ultimate goal of genes is inheritance and continuation. It will not let human beings die of genetic diseases before completing the important task of bearing and raising offspring.
But as long as the life span is long enough, cancer has become an inevitable disaster for human beings. This is why the high incidence of cancer is after the age of 40, reaching its peak at the age of 70 or 80, and the longer the average life expectancy, the more people often die of cancer.
The ancients with an average life expectancy of only 40 years rarely died of cancer, because the sanitary conditions in ancient times were much worse than now and the medical level was relatively low. Before you meet cancer, you may be killed by any ailment that seems to be happening now.
Humans have many interesting conjectures about cancer. For example, is cancer a genetic fate? Is it a method used by nature to control the number of biological populations?
Or, is cancer a genetic mutation failure? Of these10 million mutations, very few have become competitive genes, and most have become cancers that kill the body.
Opening a brain hole is always happy, but it is extremely difficult to prove it through scientific research. The mechanism of preventing cancer in human body is very fragile, and the development of medical means to cure cancer is slow. What should we do to stay away from cancer?
How does cancer develop?
People are getting older, and cancer is seizing the opportunity to "grow up".
Smog, eating gutter oil, drinking, smoking, staying up late, anxiety ... If it indulges itself many times, it will not miss the opportunity to "break through the ground".
Cancer cells are like bad children in human cells. When he creates chaos, he will be caught by the "doctor" (P53 gene) in the body, and then transformed into normal cells, and he will be euthanized directly without success.
However, doctors are limited. When human immunity declines, Xiong Haizi can't control cancer.
Cancerous cells are overbearing and unreasonable since childhood, bullying other weak cells every day, grabbing nutrition and feeding themselves extremely obese. Later, the body's "police" (lymphocytes) also attacked cancer many times, and called the whole immune system to fight it.
If you actively cooperate at this time, change into a healthy lifestyle as soon as possible, exercise more, ensure sleep and control stress, you may win the battle.
Otherwise, cancer cells will continue to produce children and grandchildren, and even build capillaries to transport nutrients.
It is too late to rely on autoimmunity, but if you go to the hospital for PET-CT, you may find cancer, and it is not too late to control it in time.
Because PET can provide detailed molecular information such as the function and metabolism of the lesion, while CT can provide accurate anatomical location of the lesion, and all the sectional images of the whole body can be obtained by one imaging, and the overall situation of the whole body can be seen at a glance.
But this test is very radioactive and costs thousands of dollars. Few people will do it on purpose. Then, cancer will continue to develop, until the middle stage of cancer, people begin to have some bad symptoms, such as gastric ulcer, bloody stool, liver pain, frequent cough and so on.
Cancer can also be detected by detecting tumor markers in the medium term, but many people don't take it seriously and think it is a minor illness, so they put up with it.
It was not until the cancerous site had grown to a large size, squeezed other organs, and the cancer cells had spread all over the body that you finally knew you had to see a doctor, but it was too late.
This process is not short, it takes at least one year from the beginning to the end, but the growth of cancer cells is an accelerated process, and most people do not pay attention to early signals, so that when cancer is discovered, it is often late.
How to do cancer screening?
Everyone attaches great importance to physical examination and cares about whether they have three highs and fatty liver, but many people are afraid of cancer and don't know how to do early screening for cancer. Ipoh read a lot of information and found some authoritative guidance for everyone.
The following recommendations are based on the clinical guidelines issued by the National Cancer Research Center and the Centers for Disease Control and Prevention 20 18. You can refer to them with confidence.
First of all, it has been generally accepted that most cancers are highly likely to be cured in the early stage and highly fatal in the late stage. Early detection, early treatment.
However, cancer screening is a two-sided matter, and it is not that the more diligent the examination, the safer it is. Some cancers are not recommended to be screened casually if they have no symptoms, which may do more harm than good.