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The sun causes 90 percent of all skin cancers. But a study has shown that a large increase in reported incidence is likely to be due to diagnostic drift which classifies benign lesions as stage 1 melanoma. “There was no change in the combined incidence of the other stages of the disease, and the overall mortality only increased from 2.16 to 2.54 cases per 100,000 per year.” The researchers concluded that their findings should lead to “re-evaluation of the role of ultraviolet radiation and recommendations for protection from it.”