By Better Health Research News Desk
Exposure of ultraviolet A light early in life is an unlikely cause of developing melanoma, according to a study published in Proceedings of the National Academy of Sciences.
A team of researchers used two types of fish, which are prone to developing melanoma, and exposed the groups to either ultraviolet A or B lights everyday during the fifth and 10th day of life. After 14 months of exposure, the scientists then tested the fish for the disease.
The results showed that 43 percent of the194 fish exposed to UVB lighting had melanoma, while only about 13 percent of the 282 fish exposed to UVA had developed the disease.
“We found that UVB exposure induced melanoma in 43 percent of the 194 treated fish, a much higher rate than the 18.5 percent incidence in the control group that received no UV exposure,” said David Mitchell, lead author and professor in M. D. Anderson’s Department of Carcinogenesis. He added that “UVA is just not as dangerous as we thought because it doesn’t cause melanoma.”
While melanoma only accounts for less than 5 percent of all skin cancer cases, it has still been proven to cause the most skin cancer-related deaths, according to the American Cancer Society.