Project description:The present study was carried out on a proband affected by Partial Androgen Insensitivity Syndrome (PAIS) and his family. The patient developed the primary RSC at 27 years. Three years after primary surgery, the patient developed a second primary (metachronous) rectal cancer relapsed one year later. The PAIS was also diagnosed in his cousin. Both cousins were found positive for the same missense androgen receptor (AR) gene mutation that was inherited from their asymptomatic mothers. The aim of this study was to identify constitutional genetic events that could have played a role in early onset of RSC in the proband. SNP-array analyses were carried out to investigate Copy Number Variations and Uniparental Disomy events as possible genetic causes linked to Colorectal Cancer pathogenesis.
Project description:A great percentage of patients with multiple primary cancers (MPCs) and family history of cancer are suspected to have a hereditary cancer predisposition syndrome. However, only a small proportion of these cases are explained by mutations in high-penetrance genes, suggesting the involvement of undiscovered genes in cancer predisposition. In this study, we report the molecular and clinical characterization of two unrelated patients with MPCs, a positive family history of cancer, no germline pathogenic mutations in BRCA1, BRCA2 and TP53 genes and large genomic rearrangements mapped on chromosome 7q. Genomic rearrangements were assessed with Affymetrix CytoScan HD Array platform in two unrelated patients (Patient 1 and Patient 2) with multiple primary cancers. Additionally, the mother of Patient 2 and four children (the son of Patient 1 and three children of Patient 2) were also evaluated.
Project description:Standard cytogenetic GTG-banding analysis (550 bands) revealed an interstitial deletion on 15q21q22 chromosomal region. Refinement of the 15q21.2 deletion intervals was conducted using aCGH (Cytoscan HD, Affymetrix) on DNA samples from the patient. This assay revealed the presence of submicroscopic alterations on chromosomes 1, 9 and 15. The result was arr[hg19] 9p24.1(6,619,823-6,749,335)x3, 1q44(248,688,586-248,795,277)x1, 15q21.2q22.2(50,848,301-61,298,006)x1. Affymetrix CytoScan HD arrays were performed according to the manufacturer's directions on DNA extracted from peripheral blood samples.
