Skin cancer is a malignant tumor that grows in the skin cells and accounts for 50 percent of all cancers. Sun exposure is a critical factor in the cause of skin cancers. Most skin cancers appear later in life, but sun damage begins at an early age.
Accounts for approximately 80 percent of all skin cancers. This highly treatable cancer starts in the basal cell layer of the epidermis (the top layer of skin) and grows very slowly. Basal cell carcinoma usually appears as a small, shiny bump or nodule on the skin – mainly those areas exposed to the sun, such as the head, neck, arms, hands and face. It commonly occurs among persons with light-colored eyes, hair, and complexion.