BRCA: The most commonly described genetic mutations associated with family history include brca1 and brca2 gene mutations. There are several other familial cancer syndromes though, and can be related to other genes such as p53 (li fraumeni syndrome) and pten (cowden's disease). Hereditary genetic syndromes as a whole are rare and comprise only about 10% of patients who have breast cancer.
Answered 3/23/2014
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