Melanoma accounts for only 1% of skin cancers, but it is the most serious. It is a disease in which malignant cells form in melanocytes. Melanocytes are the cells that give color to the skin. Melanoma can occur anywhere on the skin. Melanoma is more likely to invade nearby tissues and spread to other parts of the body than other types of skin cancer. Oftentimes, the first sign is a change in theā¦