Clinical genetics
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Women with a BRCA1 or BRCA2 mutation are at an elevated risk of developing breast and ovarian cancer; however, it is unclear to what extent family history influences the uptake of cancer prevention options. Women with a BRCA1/2 mutation completed a follow-up questionnaire that assessed uptake of cancer preventive options. The pedigree of each woman was reviewed, and information was recorded on cancers diagnosed in relatives. ⋯ Having a mother or sister with ovarian cancer significantly predicted the uptake of prophylactic oophorectomy (OR = 1.6, p = 0.04). Women with a BRCA2 mutation were less likely to have a prophylactic oophorectomy than those with a BRCA1 mutation (OR = 0.49, p = 0.0004). Among women with a BRCA1 or BRCA2 mutation, family history predicts the uptake of prophylactic mastectomy and prophylactic oophorectomy.
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Sarcoidosis is an uncommon disease of granulomatous inflammation. Genetic predisposition to sarcoidosis is indicated by observations of familial clustering, increased concordance in monozygotic twins over other siblings, and variations in susceptibility and disease presentation among different ethnic groups. Published studies on sarcoidosis have investigated a variety of genetic associations. ⋯ While investigations to date have failed to identify a unifying genetic signature associated with sarcoidosis, numerous studies have identified genetic associations with disease subtypes or within specific populations. These studies suggest that genetic susceptibility to sarcoidosis is complex and polygenic in nature. Future studies will help clarify the genetics of sarcoidosis and allow for the development of diagnostic, prognostic and therapeutic technologies.