According to the statistics of the Centers for Disease Control and Prevention (CDC), cancer is the second leading cause of death in America. However, when it comes to knowledge about this disease, the public still has a little knowledge about it. To make matters worse, many misunderstandings about diseases spread online and offline, making it difficult for people to identify correct information from unfounded fallacies. American "Best Life" website collects scientific evidence and expert advice, refuting the most common misunderstandings in this field.
Myth 1: Eating sugar will make cancer worse.
Perhaps because cancer cells consume more glucose than other cells, people believe that eating sugar will make the disease worse. However, the National Cancer Institute (NCI) refuted this statement, pointing out that "no research shows that eating sugar will make cancer worse, or if you stop eating sugar, the tumor will shrink or disappear."
Myth 2: The more dairy products you eat,
The more likely you are to get breast cancer.
Women can safely eat cheese and yogurt without worrying about breast cancer. The research results published in the International Journal of Epidemiology by researchers from Harvard School of Public Health show that there is no significant correlation between the intake of total dairy products (including both liquid dairy products and solid dairy products) and the risk of breast cancer.
Myth 3: Eating artificial sweeteners can cause cancer.
People had this concern in the 1970s and 1980s, because studies at that time showed that the intake of artificial sweeteners (such as saccharin and aspartame) would lead to cancer in mice. However, further tests prove that these substances will not have the same effect on human beings. Nowadays, the US Food and Drug Administration (FDA) claims that all sugar substitutes (except sodium cyclamate) are safe to eat.
Myth 4: Using mobile phones can cause cancer.
This common cancer misunderstanding stems from the fact that mobile phones emit electromagnetic radiation. However, there are obvious differences between high-frequency radiation (such as X-ray radiation) and low-frequency radiation (radiation emitted by mobile phones). Although high-frequency radiation will increase the risk of cancer, there is no conclusive evidence that low-frequency radiation has such an effect on the body. Epidemiological studies on the exposure of mobile phones to radio-frequency electromagnetic fields have not shown that users have an increased risk of brain tumors or other cancers.
Myth 5 Cancer is completely a genetic disease.
Although medical scientists are still investigating the causes of cancer, the National Cancer Institute of the United States suggests that 5%~10% of cancers are caused by genetic factors, and the remaining risk factors include exposure to harmful substances in the environment (such as tobacco and air pollutants) and genetic mutations caused by aging.
Myth 6: Only women get breast cancer
Although it is not common, it is also possible for men to develop breast cancer, but the probability is low. The probability of breast cancer in an average man’s life is 1 in 883.
Myth 7: If the mammogram results are normal,
There would be no breast cancer.
Because mammography may miss important information, it is impossible to make a diagnosis only by mammography. High-risk groups with genetic susceptibility to breast cancer should consider magnetic resonance imaging (MRI) for more accurate screening.
Myth 8: Hair dyeing will increase the risk of cancer.
The research results on carcinogenesis of hair dyes are contradictory. Therefore, the International Agency for Research on Cancer (IARC) concluded that hair dyes do not include carcinogens harmful to human beings, but they also warned that occupational exposure (such as hairdressers) may cause cancer to human beings.
Myth 9: Weight has nothing to do with cancer risk.
Weight is directly related to the risk of cancer. According to the research results published in The Lancet-Oncology by researchers from the International Agency for Research on Cancer, in 2012, 3.6% of all new cancer cases among adults were related to weight.
There are many reasons why obese people have a high risk of cancer. One theory is that overweight people have chronic low-grade inflammation, which will damage DNA over time and eventually lead to illness.
Myth 10: People with dark skin color should not have skin cancer.
Although skin cancer is more common in people with light skin color, dark skin color does not protect you from ultraviolet radiation. The research results published in the Journal of American Dermatology Association by researchers in case western reserve university, USA, show that melanoma is more deadly to people with darker skin color; Moreover, some skin cancers (such as acral melanoma) are more common in people with dark skin color.
Myth 11 Using antiperspirants can lead to breast cancer.
This misconception is that the substances in antiperspirants will penetrate into axillary lymph nodes, causing cell mutation, which will lead to cancer. However, the American Cancer Society refuted this statement, pointing out that "there is little scientific evidence" to support this speculation.
Researchers at the Fred Haakinson Cancer Research Center in Seattle, USA, published research results in the Journal of the National Cancer Institute, showing that the use of antiperspirants and deodorants has nothing to do with the increased risk of breast cancer.
Myth 12 Breast augmentation will increase the risk of breast cancer
A meta-analysis published by FDA researchers in the Journal of Plastic Surgery shows that breast augmentation does not increase the risk of breast cancer. However, it is worth noting that there is a small connection between breast augmentation and anaplastic large cell lymphoma, but this rare cancer can be treated.
Myth 13: People who receive cancer treatment must be hospitalized.
Although the treatment of cancer does require several visits to the hospital, patients do not need to stay there until their condition is relieved. In fact, many patients with early cancer can continue to live a normal life and only need to go to the hospital for treatment and examination on a regular basis.
Myth 14 Only smokers get lung cancer.
Although smokers are more likely to develop lung cancer, other risk factors (such as secondhand smoke, radon in the air and exposure to asbestos) also increase the risk of lung cancer.
Misunderstanding 15
Infection with human papillomavirus will definitely lead to cervical cancer.
Some strains of human papillomavirus (HPV) develop into cervical cancer over time, but this is not always the case. There are more than 200 strains of HPV, but only a few of them are high risk factors for cervical cancer. About 70% of cervical cancer is caused by two types (HPV16 and HPV18).
Myth 16
Negative emotions can make
The condition of cancer patients is worse.
Usually, when cancer patients have no improvement after receiving treatment, their instinct is to blame their negative attitude as the root of the problem. However, the American Cancer Society points out that there is no connection between personality characteristics and cancer survival rate.
Myth 17: Surgery will cause cancer to spread.
According to the Cancer Council of New South Wales, Australia, there is no evidence to support the spread of cancer caused by surgery. Because this disease grows and reproduces in the blood, it has nothing to do with surgery.
Myth 18 Herbal supplements can cure cancer.
According to the research results published in the Journal of Evidence-based Complementary and Alternative Medicine by researchers from Taiwan Province Agricultural Biotechnology Research Center in China, only when combined with conventional treatment can herbal supplements play a role in relieving the disease.
Myth 19 Biopsy will lead to the spread of cancer.
Because some patients feel worse after biopsy, they mistakenly believe that exposing cancer to the air will make their condition worse. In fact, there is no evidence that biopsy of lesions will lead to the spread of cancer, and there is no evidence that exposing tumors to the air will lead to its spread to other body parts.
Myth 20 Chemotherapy always makes patients feel uncomfortable.
Since the first use of chemotherapy in the 1940s and 1950s, this therapy has made great progress. In order to reduce or even eliminate the side effects, medical scientists have made great efforts, and the patients’ bad feelings are not as serious as imagined.
Myth 21 Cancer is contagious.
Cancer itself is not contagious, and you can’t get the disease from others at all. However, some infectious viruses (such as HPV and hepatitis B and C viruses) can cause cancer, so we need to be careful.
Myth 22 Fluoride can cause cancer.
Fluoride in tap water and toothpaste does not cause cancer. In February 1991, after reviewing more than 50 population studies, the US Department of Health and Human Services announced that fluoride in its natural form would not pose a cancer risk to human beings.
Myth 23 getting cancer is equivalent to being sentenced to death.
Due to technological progress and new medical discoveries, the survival probability of cancer patients is much higher than before. According to the data of the National Cancer Institute, the 5-year survival rate of all types of cancer adds up to about 67%, while for specific cancers such as breast cancer, prostate cancer and thyroid gland, this statistic is as high as 90%. (Compile/Guo Shaoshan)