Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Skin Cancer ?
    ### Response:
    Key Points
                    - Skin cancer is a disease in which malignant (cancer) cells form in the tissues of the skin.    - There are different types of cancer that start in the skin.     - Skin color and being exposed to sunlight can increase the risk of nonmelanoma skin cancer and actinic keratosis.
    