Fact Sheets

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.
Lichen Sclerosus
Lichen sclerosus is a rare skin disease that causes itchy and painful patches of thin, white, wrinkled-looking skin. Learn about symptoms and treatment.
Skin Cancer
A disease caused by ultraviolet light that comes from the sun’s rays.
Ringworm (Tinea)
A fungal infection that can affect the skin, fingernails, toenails, and/or hair.
Cutaneous T-cell Lymphoma
Cutaneous T-cell lymphoma (CTCL) is a rare form of lymphoma that can affect the skin, blood, lymph system, and internal organs. 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.
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.
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.
Dermatitis herpetiformis
Dermatitis herpetiformis is an autoimmune disease triggered by eating gluten. Learn about symptoms and treatment.