There are many causes of cancer, including:
In the 1970s, a relatively popular in the US was a specialized form of , based on the idea that cancer was caused by a bad attitude. People with a "cancer personality"—depressed, repressed, self-loathing and afraid to express their emotions—were believed to have manifested cancer through subconscious desire. Some psychotherapists said that treatment to change the patient's outlook on life would cure the cancer. Among other effects, this belief allowed society to for having caused the cancer (by "wanting" it) or having prevented its cure (by not becoming a sufficiently happy, fearless and loving person). It also increased patients' anxiety, as they incorrectly believed that natural emotions of sadness, anger or fear shorten their lives. The idea was ridiculed by , who published while recovering from treatment for in 1978. Although the original idea is now generally regarded as nonsense, the idea partly persists in a reduced form with a widespread, but incorrect, belief that deliberately cultivating a habit of will increase survival. This notion is particularly strong in .
Can Laser Hair Removal Cause Cancer?
Moore, P. S. et. al. (2010). Why do viruses cause cancer? Highlights of the first century of human tumor virology. Nature Reviews Cancer, 10, 878-889.
"The conclusion that processed meat (e.g., hot dogs, bacon, sausage, deli meats, etc.) causes cancer and that red meat (e.g., beef, pork, lamb) is a probable cause of cancer may come as a surprise to a public that for years has relied heavily on red and processed meats as a part of its diet," said Susan Gapstur of the American Cancer Society.
Cancer is often perceived as a disease that strikes for noapparent reason. While scientists don't yet know all the reasons, many of thecauses of cancer have already been identified. Besides intrinsic factors suchas heredity, diet, and hormones, scientific studies point to key extrinsicfactors that contribute to the cancer's development: chemicals (e.g., smoking),radiation, and viruses or bacteria. The facts are not everybody gets cancer, so maybe it has to do with something else. Two doctors believe they discovered the cause of cancer. Dr. W. Douglas Brodie, founder of the Reno Integrative Medical Center in Nevada and Dr. Ryke Geerd Hamer, a former German physician and founder of German New Medicine examined thousands of cancer patients and came up with the same conclusions. They believe cancer is caused by suppressing toxic negative emotions, primarily anger, hate and resentment and grief–beginning 18-24 months prior to diagnosis. But even though the risk of brain and related cancers is low — in 2012, there were 6.4 cases per 100,000 U.S. adults — Yakymenko says we should be on alert because ailments can take up to 30 years to develop.Soy foods have a lot of isoflavones, which are weak estrogen-like compounds found in plants. Because estrogen can promote the development, growth, and spread of breast cancers, doctors have worried that eating a lot of soy foods or soy isoflavones (which can be taken as a dietary supplement) might worsen the prognosis of women diagnosed with breast cancer.Close to 48,250 Americans will be diagnosed with oral or pharyngeal cancer this year. It will cause over 9,575 deaths, killing roughly 1 person per hour, 24 hours per day. Of those 48,250 newly diagnosed individuals, only slightly more than half will be alive in 5 years. (Approximately 57%) This is a number which has not significantly improved in decades. (The survival number at 5 years from diagnosis was for many decades about 50%, so 57% is an improvement over the last ten years. However this is due to the increase of HPV16 caused cancers which are more vulnerable to existing treatment modalities, conferring a significant survival advantage. So a change in the etiology, not improved early discovery or treatments; which are relatively unchanged from a decade ago, are not the sole cause for improvement.) The death rate for oral cancer is higher than that of cancers which we hear about routinely such as cervical cancer, Hodgkin’s lymphoma, laryngeal cancer, cancer of the testes, and endocrine system cancers such as thyroid. If you expand the definition of oral and oropharyngeal cancers to include cancer of the larynx, the numbers of diagnosed cases grow to approximately 54,000 individuals, and 13,500 deaths per year in the U.S. alone. Worldwide the problem is much greater, with over 450,000 new cases being found each year. Note that the world incidence numbers from the WHO, while the best available, are estimates that users should consider with caveats. Data collection and reporting in some countries is problematic in spite of the professional efforts of the WHO to be accurate.Cancer is a complex group of diseases with many possible causes. In this section you can learn more about the known causes of cancer, including genetic factors; lifestyle factors such as tobacco use, diet, and physical activity; certain types of infections; and environmental exposures to different types of chemicals and radiation. While past research results have been mixed, a small study done by researchers at the Memorial Sloan Kettering Cancer Center and Weill Cornell Medical College suggests that for some women, adding a medium amount of soy to their diets turns on genes that can cause cancer to grow.This week, the World Health Organization managed to inject even more confusion into an already confusing question: whether glyphosate, the common weed killer popularized as Roundup by Monsanto, causes cancer.Learn about some of the environmental causes of cancer that may lurk in our homes, at work, in pollution, and even in some medical tests and treatments. You can also learn how some types of infections are linked to cancer.For the real world, regulatory agencies determine “risk” by studying whether consumers or farm workers actually encounter glyphosate at levels that cause cancer. So far, the answer has been no, with the draft summary from the joint meeting this week and the European Food Safety Authority’s . (The US Environmental Protection Agency is in the middle of reassessing the herbicide, but it last concluded glyphosate posed no cancer risk in 1993.)