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What are the Causes and symptoms of skin cancer
Most cases of nonmelanoma skin cancer are caused by damage to DNA resulting from exposure to ultraviolet radiation of the sun. People with light complexions have a higher rate of skin cancer than those with dark skin, and males are more likely to develop skin cancer than females. Exposure to substances such as arsenic, coal, and tar has been linked to skin cancer, as has infection with human papillomavirus (HPV), particularly those infections causing genital warts. Other factors that increase skin cancer rates are chronic inflammatory skin diseases, long-term treatment for psoriasis, previous radiation treatment, and immune suppression. The rare congenital disorders xeroderma pigmentosum and basal cell nevus are also associated with increased risk.
The predominant symptom of nonmelanoma skin cancer is an unusual growth, mole, or other abnormal appearance on the skin. Abnormalities may be raised or flat and may be red, pink, black, blue, brown, or flesh-coloured. Moles or growths that are new, that grow or change shape rapidly, or that will not heal are particular signs of skin cancer and should be examined by a dermatologist.
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