Analysis of Molecular Biomarkers in Periocular Adnexal Tumours

"Three to nine sections will be used as the source of DNA for each tumor. The pathologist will identify and separate tumor tissue from normal tissue, and the two DNAs will be sequenced separately. Variants obtained from tumor and normal tissue will be compared, with different outcomes. Expected in this way are 1) somatic/tumor-specific variants (which are absent in normal tissue), 2) variants lost during tumor evolution due to segmental chromosomal deletion or other mechanisms that cause loss of heterozygosity. Using these two classes of variants, a clustering analysis will be performed at the end of the sequencing project to better define the phenotype and molecular signature of the tumors. In the prospective part of the project, the new tumors will be frozen fresh. This resource will allow methyloma analysis to be performed."