Melanoma is a skin cancer. It affects skin cells called melanocytes. These cells produce skin color. They also give moles their dark color. Under normal conditions, moles are benign skin tumors. This means non-cancerous. Sometimes a mole can develop into melanoma. A new mole may also be an early melanoma.
Melanoma is less common and more dangerous. They are much more likely to spread to other parts of the body.