title: Genetic susceptibility to breast cancer.
abstract: Genetic and lifestyle/environmental factors are implicated in the aetiology of breast cancer. This review summarizes the current state of knowledge on rare high penetrance mutations, as well as moderate and low-penetrance genetic variants implicated in breast cancer aetiology. We summarize recent discoveries from large collaborative efforts to combine data from candidate gene studies, and to conduct genome-wide association studies (GWAS), primarily in breast cancers in the general population. These findings are compared with results from collaborative efforts aiming to identify genetic modifiers in BRCA1 and BRCA2 carriers. Breast cancer is a heterogeneous disease, and tumours from BRCA1 and BRCA2 carriers display distinct pathological characteristics when compared with tumours unselected for family history. The relationship between genetic variants and pathological subtypes of breast cancer, and the implication of discoveries of novel genetic variants to risk prediction in BRCA1/2 mutation carriers and in populations unselected for mutation carrier status, are discussed.
authors.affiliation: Centre for Cancer Genetic Epidemiology, Department of Public Health and Primary Care, University of Cambridge, Strangeways Research Laboratory, Worts Causeway, Cambridge CB1 8RN, United Kingdom.
authors.forename: Nasim
authors.initials: N
authors.lastname: Mavaddat
authors.forename: Antonis C
authors.initials: AC
authors.lastname: Antoniou
authors.forename: Douglas F
authors.initials: DF
authors.lastname: Easton
authors.forename: Montserrat
authors.initials: M
authors.lastname: Garcia-Closas
mesh_terms: D001943:Breast Neoplasms / Q000235:genetics* / Q000473:pathology; D005260:Female; D019398:Genes, BRCA1; D024522:Genes, BRCA2; D020022:Genetic Predisposition to Disease; D055106:Genome-Wide Association Study; D006579:Heterozygote; D006801:Humans; D009154:Mutation; D019683:Penetrance; D011110:Polymorphism, Genetic