Following steps in the development of cancer in an individual with xeroderma pigmentosum: 1.Mutation in DNA repair enzyme gene 2.Exposure to UV light 3.Mutation of a tumor-suppresor gene -initiates abnormal cell growth 4.Benign growth- the earliest cell growth 5.Malignant growth- later stage of cell growth 6.Metastasis- last step of cancer, usually fatal