Fact Sheets

Skin Cancer
A disease caused by ultraviolet light that comes from the sun’s rays.
Melanoma
Melanoma is a type of skin cancer that forms in the cells that produce skin color. Learn about symptoms and treatment.
Basal Cell Carcinoma (BCC)
Basal cell carcinoma accounts for 80 percent of all skin cancers. The cause is damage to the DNA of cells in the epidermis, the top layer of the skin.
Squamous Cell Carcinoma
Squamous cell carcinoma is a cancer in the middle and outer skin layers caused by ultraviolet (UV) exposure. Learn about symptoms and treatment.
Mohs Surgery for Skin Cancer
Mohs surgery is a type of surgery for skin cancer that minimizes the amount of skin removed. Learn more about this procedure.
Merkel Cell Carcinoma (MCC)
Merkel cell carcinoma is a rare, aggressive form of skin cancer. It usually affects sun-exposed areas of the body, but it can occur in sun-shielded areas, too. Learn about symptoms and treatment.
Actinic Keratosis (AK)
Actinic keratosis (AK) is a scaly and rough patch of skin caused by years of sun damage. Learn about symptoms and treatment.
Skin Lymphoma
Skin lymphoma is a rare form of skin cancer that is not linked to sun exposure. Learn about symptoms and treatment.
Photoaging (Sun Damage)
Photoaging is when the sun prematurely—and sometimes dangerously—ages the skin. Learn about symptoms and treatment.
Seborrheic Keratosis
A common type of noncancerous skin tumor that resembles a wart and may bleed or be itchy.