1. The English word “cancer” comes from the Greek word “crab”, because the shape of the cancer mass infiltrating and growing into the surrounding normal tissues resembles the pincers of a crab. 2.In 1804, the world’s first general anesthesia surgery was performed on a woman with breast cancer. 3.Tobacco is the largest cancer risk factor, causing more than 1/5 of all cancer deaths. In addition, another 1/5 of cancers are caused by chronic infections, such as cervical cancer caused by HPV and liver cancer caused by hepatitis B virus. 4. With improved treatments, cancer is no longer a certain death and there are now 28 million cancer survivors worldwide. Certain types of cancer, such as testicular cancer in men, also produce human chorionic gonadotropin (hCG). This means that it is possible to detect testicular cancer with an early pregnancy test (but not all testicular cancers have elevated hCG). 6, The first documented mastectomy took place in 548 A.D. The patient, Theodora, was a Byzantine queen at the time. 7.Japanese scientists have trained a black Labrador that can sniff people’s whistles to determine whether the other person is a colorectal cancer patient. Through the study, it was found that the accuracy rate of the dog sniffing out cancer patients is as high as 98%. 8, the incidence of breast cancer in the left breast, significantly higher than the right breast. Scientists have not found a reasonable explanation so far. Moreover, scientists also found that women with left-handedness are more likely to develop breast cancer. 9. On average, cancer cells multiply every 100 days. That is to say, it takes at least 10 years for 1 cancer cell to proliferate to the point where it can be detected (1cm in diameter)! You can be unaware of the above cancer knowledge, it does not affect the future life and death. But you must know: more than 30% of cancers can be prevented by quitting smoking, controlling alcohol, eating a healthy diet, and exercising regularly. And early diagnosis and aggressive treatment of cancer can significantly improve prognosis and survival.