BackgroundIncidence and mortalityThere are three main types of skin cancer:Basal cell carcinoma (BCC).Squamous cell carcinoma (SCC), which together with BCC is referred to as nonmelanoma skin cancer (NMSC).Melanoma.BCC and SCC are the most common forms of skin cancer but have substantially better prognoses than the less common, generally more aggressive, melanoma.NMSC is the most commonly occurring cancer in the United States. Its incidence appears to be increasing in some, but not all, areas of the country. Overall U.S. incidence rates have likely been increasing for a number of years. At least some of this increase may be attributable to increasing skin cancer awareness and resulting increasing investigation and biopsy of skin lesions. The total number and incidence rate of NMSCs cannot be estimated precisely because reporting to cancer registries is not required. However, based on extrapolation of Medicare fee-for-service data to the U.S.
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