Skin cancer is the abnormal growth of skin cells caused by excessive exposure to ultraviolet (UV) radiation. This type of radiation can come from both natural sources like sunlight and artificial sources such as tanning beds. The most common type of skin cancer is melanoma, which accounts for about 3% of all skin cancers but causes the majority of skin cancer deaths. Other major forms of skin cancer include basal cell carcinoma and squamous cell carcinoma.
Skin Cancer pages:
Cited from the Mayo Clinic & the American Academy of Dermatology