Basal cell carcinoma, or BCC, is the most common type of skin cancer, accounting for over 4 million cases annually in the United States, an incidence 4 times greater than the incidence of squamous cell carcinoma, the second most common form.
Actinic keratoses are precursors to squamous cell carcinomas and often indicate that an individual has had sufficient sun damage to warrant close observation for the development of skin cancers. Melanoma accounts for less than 1% of skin cancer cases, however it is the most responsible for skin-cancer related deaths. The biggest contributor to the causes of skin cancer is sunlight. Though skin cancer is the most common form of cancer, it is also one of the most preventable. Adequate sun protective methods including the daily use of a sunscreen with an SPF of 15 or greater may reduce risks of melanoma by as much as 50% and squamous cell carcinoma by 40%.