Non-carriers do not have increased risk of breast cancer due to familial mutation

[News]

A population-based analysis of more than 3,000 families including women with breast cancer has found that close relatives of women who carry mutations in a BRCA gene - but who themselves do not have such genetic mutations - do not have an increased risk of developing breast cancer compared to relatives of women with breast cancer who do not have such mutations.

More... (http://www.news-medical.net/news/20111101/Non-carriers-do-not-have-increased-risk-of-breast-cancer-due-to-familial-mutation.aspx)