Once exposed to skin cancer, other cancer risk will haunt

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According to experts, the most common skin cancer in the lining of squamous cell, basal and skin melanocytes. But lately, a new study finds sufferers non-melanoma skin cancer (cancer that occurs in the third layer of cells) at high risk exposed to other cancer more severe a few years later.

In this study, a team of researchers led by Jiali Han, professor of dermatology from Harvard Medical School observe the risk of cancer in 153 600 people who participated in two big studies, the Health Professionals Study (since 1986) and the Nurses' Health Study (since 1984). 20th Annual later or precisely in 2008, there were 29,500 cases of cancer have been diagnosed from the overall participants.

This study found that women who exposed to non-melanoma skin cancers such as basal cell carcinoma and squamous cell carcinoma 26 percent bigger of opportunity to exposed skin cancer or other types of cancer than women who did not exposed to skin cancer at all. The same risk is also haunt man, but is only as big 15 percent.

In addition, sufferers non-melanoma skin cancer are also at high risk of suffering from the deadly skin cancer melanoma, and specifically for women who exposed to non-melanoma skin cancer at high risk exposed to lung cancer and breast cancer.

Researchers also took into account other factors that could affect the results of findings such as age of participants and smoking habits, whereas in women researchers are also considering the use of hormone replacement therapy which conducted participant.

"The link between non-melanoma skin cancer and the emergence of melanoma in later life, could be caused by exposure to sunlight," explained the researchers.

But according to Anthony Alberg, a professor of epidemiology from the Medical University of South Carolina, who was not involved in these studies, the reasons underlying the high risk of other skin cancers is not so clear. "A number of researchers suspect the cellular machinery that involved in DNA repair in some people seem to not work well, thus making them a higher risk for attacked any type of cancer," he said.

"However, Because big data base, these findings considered add to the evidence that the existence of relationship between skin cancer with other cancer risk. Nevertheless, the risk of cancer is shown in this study is not adequate to provide recommendations on the people who suffer non-melanoma skin cancer, in order to undergo screening earlier or more frequently than usual, "said Alberg.

And usually most people are exposed to skin cancer is the people who white skin, whereas the people are brown-skinned or black is rarely happens.

These studies has been published in the journal PLoS Medicine.