- Genetic markers (CDKN2α), BRAF, MC1R
- Photo skin type I/II
- Family history of dysplastic nevi or melanoma
- Personal history of melanoma
- Ultraviolet irradiation, particularly sunburns during childhood and intermittent burning exposures
- Number (>50) and size (>5 mm) of melanocytic nevi
- Congenital nevi
- Number of dysplastic nevi (>5)
- Dysplastic melanocytic nevus syndrome
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