title: Maternal and paternal lineage double heterozygosity alteration in familial breast cancer: a first case report.
abstract: Hereditary breast cancer syndrome was firstly associated with BRCA1 and BRCA2 genes the mutations of which confer high risk to develop breast and/or ovarian cancer. Double heterozygosity is a rare condition in which both BRCA1 and BRCA2 mutations are present in a family at the same time. In the current study, a family with double heterozygosity has been reported. Furthermore, for the first time a molecular analysis in both proband lineages, maternal and paternal, has been reported to understand the provenience of both germinal mutations.The case regards a woman who developed breast and ovarian cancer with liver metastasis which presented two mutations, each in the two genes, transmitted from her mother and her father, respectively. In this family all available members have been investigated. The concomitant presence of these peculiar mutations was never reported before suggesting a link with Caucasian population from Southern Italy.
authors: Clinical Experimental Oncology Laboratory, National Cancer Centre, Giovanni Paolo II- v. Hahnemann 10, 70126, Bari, Italy.
authors: Brunella
authors: B
authors: Pilato
authors: Simona
authors: S
authors: De Summa
authors: Katia
authors: K
authors: Danza
authors: Rossana
authors: R
authors: Lambo
authors: Angelo
authors: A
authors: Paradiso
authors: Stefania
authors: S
authors: Tommasi
mesh_terms: D000328:Adult; D019313:BRCA1 Protein / Q000235:genetics*; D024682:BRCA2 Protein / Q000235:genetics*; D001943:Breast Neoplasms / Q000235:genetics* / Q000473:pathology; D004252:DNA Mutational Analysis; D005260:Female; D020022:Genetic Predisposition to Disease; D040941:Heredity; D006579:Heterozygote; D006801:Humans; D007558:Italy; D008113:Liver Neoplasms / Q000235:genetics / Q000556:secondary; D008297:Male; D008875:Middle Aged; D009154:Mutation; D010051:Ovarian Neoplasms / Q000235:genetics* / Q000473:pathology; D010375:Pedigree; D010641:Phenotype
chemical_list: D019313:BRCA1 Protein; C492913:BRCA1 protein, human; D024682:BRCA2 Protein; C551750:BRCA2 protein, human