The World Health Organization report shows that there are many misconceptions about cancer from the public, patients, to some health care professionals. 1. Cancer is mainly determined by genes In fact, heredity is only one of the factors of cancer occurrence. Environmental pollution, bad living and eating habits, excessive stress, etc. are closely related to the occurrence of cancer. Some cancers have higher genetic risk and need to be screened, for example, if a mother has breast cancer, her daughter’s risk of breast cancer is 2~3 times of the general population. However, the genetic risk of some cancers is very small, for example, only about 5% of colorectal cancer patients are related to genetics. 2. It is wrong to say that cancer is not preventable. The World Health Organization suggests that 1/3 of malignant tumors can be prevented, 1/3 can be treated and 1/3 can be cured, and the initiative of cancer prevention is in everyone’s own hands. The American Association for Cancer Research points out that the easiest way to prevent cancer is to eat more fruits and vegetables, which can reduce the chance of cancer by 20%. Vegetarians are less likely to get cancer. Studies show that people who often eat large fish and meat do have a higher risk of cancer, while vegetarians who eat fruits and vegetables every day and have sufficient dietary fiber intake have a lower risk of colorectal cancer than normal people. However, a long-term vegetarian diet may cause nutritional imbalance. Be sure not to be partial or picky, try to eat mainly natural ingredients and eat 5 copies of different color fruits and vegetables every day. 4.Moles are prone to skin cancer. Most of the moles on the body are benign black pigmented moles, so there is no need to worry. However, if there are abnormal changes in color, size and shape of moles, special attention should be paid. 5.Large breasts are prone to breast cancer. Large breasts are not a high risk factor for breast cancer, but family history is. Other risk factors include early menarche, late menopause, unmarried, infertile, late childbearing, not breastfeeding, etc. If you come to the clinic only when you feel a hard lump or feel pain when wearing underwear, the cancer is mostly in stage 2 or later and may require mastectomy. If detected and treated early, the cure rate of breast cancer is very high, and the 5-year survival rate of stage 0 to 1 cases is as high as 95%. Organic food can prevent cancer. Organic food does not use chemical pesticides, chemical fertilizers, herbicides and other unnatural drugs in the planting or cultivation process, so the safety of ingredients is higher. There is no difference between the cancer risk of women who consume organic food for a long time and those who never eat organic food. To eat healthy, you need to diversify your diet, eat more local seasonal foods, and eat a little nut every day. 7.Late stage cancer is hopeless Even if the cancer metastasizes, the severity varies and cannot be generalized. Such as advanced lung cancer, breast cancer, etc. can be better controlled, as long as the treatment is in accordance with medical advice, there is hope for a long “survival with tumor”. 8.Fasting can kill cancer cells Generally speaking, cancer patients who fast can lose 10 kilograms a week and their immunity is reduced, which makes cancer cells more likely to survive. Studies have found that sugar is the favorite food of cancer cells, and the incidence of colorectal cancer, breast cancer, endometrial cancer and other cancers are related to the love of sugar. Harvard Medical School study found that women who love to eat high glycemic index food have 3 times higher risk of colorectal cancer than normal people. 9, radiotherapy will definitely lose hair chemotherapy drugs will “kill both good and bad”, so that the normal cells are damaged, especially the hair follicle cells, germ cells and other destructive effects, such as breast cancer chemotherapy drugs easily cause hair loss. However, some chemotherapy drugs for gastrointestinal tumors only work on the mucous membrane cells of the gastrointestinal tract, so patients will not experience hair loss.