Skin cancer is the most common form of cancer in the United States. One in five Americans will develop skin cancer in their lifetime. Basal cell carcinoma and squamous cell carcinoma are the most common types of non melanoma skin cancer. Melanoma, the most serious form of skin cancer, represents only three percent of skin cancers, but causes seventy five percent of deaths attributed to skin cancer. One in fifty five Americans will be diagnosed with melanoma in their lifetime.