Age at first Skin Cancer oc0 0987654321 00000000000 0102030405060708090 Age (yea - o- XP population - Non-XP population Figure by MIT OCWAge at First Skin Cancer 100 90 80 70 60 50 40 30 20 10 0 0 10 XP population Non-XP population 20 30 40 50 60 Age (years) Cumulative Cancer Incidence (%) 70 80 90 Figure by MIT OCW