Skin cancer refers to the abnormal, uncontrolled growth of skin cells. The American Academy of Dermatology estimates that one in five people will develop skin cancer in their lifetime. People with fair skin, frequent sun exposure and a family history of skin cancer are at greatest risk. Fortunately, skin cancer is almost always curable if detected and treated early.
If not treated early, the cancer can advance and spread to other parts of the body, where it becomes hard to treat and can be fatal. While it is not the most common of the skin cancers, it causes the most deaths.