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There are three main types of skin cancer. More than 5 million basal and squamous cell skin cancers are diagnosed each year. Melanoma, the most deadly type of skin cancer, will account for about 76,380 cases of skin cancer in 2016, according to the American Cancer Society. Other non-melanoma skin cancers account for less than 1 percent. Melanoma is the deadliest because it’s directly related to sun exposure. Its rates in the U.S. have doubled from 1982 to 2011, according to the American Academy of Dermatology (AAD).