Skin cancer and solar UV radiation.
Exposure to UV radiation is the main factor that causes skin cells to become cancer cells. Almost all skin cancers (approximately 99% of non-melanoma skin. to ultraviolet (UV) radiation is a major risk factor for most skin cancers. Time of day: UV rays are strongest between 10 am and 4 pm. Sun damage and cancer: how UV radiation affects our skin. January 12 . Spot the difference: harmless mole or potential skin cancer? How to.
The cancer data included codes to separate basal cell and squamous cell carcinoma non-melanoma skin cancerwhich typically do not result in death, from melanoma, which, untreated, typically does.
The relationship between UV exposure and incidence of skin cancer.
Overall, the data set included 4. The researchers analyzed the data several different ways, but the results were similar in all cases.
Figure 1 shows the cumulative incidence of hip fractures, heart attacks, and death as a function of age in individuals who also had a diagnosis of non-melanoma skin cancer. As you can see in the graphs, those who were diagnosed with non-melanoma skin cancer also had fewer hip fractures, fewer heart attacks, and lived longer.
How the sun and UV cause cancer | Cancer Research UK
A beneficial effect of sun exposure per se needs to be examined in other studies. According to the American Cancer Society, in the U. In this data set, a heart attack is about 15 times more likely than melanoma. The policy experts who insist that UV should be limited have no evidence showing that limiting UV is beneficial to health in any way other than reducing skin cancer.
Does UV radiation cause cancer?
The relationship between UV, skin cancer, heart attack and risk of death Richard Barkley October 8, at As noted, in the U. Looking for an answer I found this interesting site: Observational studies have also found links between certain behaviors and markers of sun exposure and melanoma of the skin, including: Because UV radiation does not penetrate deeply into the body, it would not be expected to cause cancer in internal organs, and most research has not found such links.
However, some studies have shown possible links to some other cancers, including: Merkel cell carcinoma a less common type of skin cancer Some types of eye cancer, such as melanoma of the eye and squamous cell carcinoma of the conjunctiva Artificial sources of UV rays Indoor tanning: Studies have found that people who use tanning beds or booths have a higher risk of skin cancer, including melanoma and squamous and basal cell skin cancers.
- Skin cancer and solar UV radiation.
- How the sun and UV cause cancer
- Does UV radiation cause cancer?
The risk of melanoma is higher if the person started indoor tanning before age 30 or 35, and the risk of basal and squamous cell skin cancer is higher if indoor tanning started before age 20 or Welding and metal work: Some studies have suggested that welders and sheet metal workers might have a higher risk of melanoma of the eye.
People exposed to UVA as a treatment for skin conditions such as psoriasis as a part of PUVA therapy have an increased risk of squamous cell skin cancers. Studies in the lab Studies of cells Studies of cells in lab dishes and test tubes have shown that sunlight and simulated sunlight for example, from xenon or xenon-mercury arc lamps can cause DNA damage mutations. Studies in animals Exposure of mice, rats, and some other lab animals to sunlight and artificial sources of UV rays has been shown to lead to skin cancers.
Most of these cancers have been squamous cell carcinomas.UV Sunburn and Skin Cancer Sunsmart UK
Some exposed animals have also developed cancers of the eye affecting the cornea and conjunctiva. What expert agencies say Several national and international agencies study different substances in the environment to determine if they can cause cancer. A substance that causes cancer or helps cancer grow is called a carcinogen.