Many CDKN2A genetic and epigenetic changes impact both the p16INK4a and p14ARF protein products encoded by this locus, and although early studies confirmed the major contribution of p16INK4a in CDKN2A-associated melanoma, there is now significant evidence that p14ARF plays an important and additional role in melanomagenesis. This evidence concerns the gene CDKN2A and melanoma.