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Gandolfi G.,Laboratory Of Translational Research Arcispedale S Maria Nuova Irccs Reggio Emilia Italy | Longo C.,Skin Cancer Unit Arcispedale Santa Maria Nuova IRCCS Reggio Emilia Italy | Moscarella E.,Skin Cancer Unit Arcispedale Santa Maria Nuova IRCCS Reggio Emilia Italy | Zalaudek I.,Medical University of Graz | And 7 more authors.
Pigment Cell and Melanoma Research | Year: 2016

Recent evidence indicates that melanoma comprises distinct types of tumors and suggests that specific morphological features may help predict its clinical behavior. Using a SNP-array approach, we quantified chromosomal copy number alterations (CNA) across the whole genome in 41 primary melanomas and found a high degree of heterogeneity in their genomic asset. Association analysis correlating the number and relative length of CNA with clinical, morphological, and dermoscopic attributes of melanoma revealed that features of aggressiveness were strongly linked to the overall amount of genomic damage. Furthermore, we observed that melanoma progression and survival were mainly affected by a low number of large chromosome losses and a high number of small gains. We identified the alterations most frequently associated with aggressive melanoma, and by integrating our data with publicly available gene expression profiles, we identified five genes which expression was found to be necessary for melanoma cells proliferation. In conclusion, this work provides new evidence that the phenotypic heterogeneity of melanoma reflects a parallel genetic diversity and lays the basis to define novel strategies for a more precise prognostic stratification of patients. © 2015 John Wiley & Sons A/S.

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