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Causes of
Skin Cancer
Sunburns
& Ultraviolet
(UV) Light
Sun exposure and UV light are the leading cause of skin
cancer. Tanning is the skin's defense response to the sun's damaging
rays (UV light), but tanning does not prevent skin cancer. Most people
receive 80% of their lifetime sun exposure by the age of 18. One severe
sunburn can increase your risk of skin cancer by as much as 50%. Sun
damage to the skin accumulates over many years of exposure, and about
90 percent of sun-induced skin cancer occurs in the areas that have
the greatest exposure, namely the head, neck, and forearms.
Heredity / Genetics
People
with a family history of skin cancer are at an increased risk of
skin cancer. Individuals with fair complexions develop skin cancer
more frequently than those with dark skin. The tendency to develop
skin cancer is inherited and certain ethnic groups, such as the
Scots, Irish, and Northern Italians, are particularly prone to developing
skin cancer because of their fair skin. Several genetic defects,
which are linked to skin cancer, have recently been described. Patients
with a family history of melanoma have a significant increased risk
of developing melanoma.
Other
Other known
causes of skin cancer include exposure to X-rays, radioactivity,
coal tar and pitch derivatives, chronic arsenic exposure, and infection
by some human papilloma viruses.
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