Does being diagnosed with ovarian cancer increase a patient’s risk of developing breast cancer?

Women with the most common form of hereditary ovarian cancer are also at increased risk for breast cancer. Every single woman with ovarian cancer that originates in the epithelium, or the thin tissue surrounding the ovary, should be offered BRCA1 and BRCA2 testing as a standard of care, according to National Comprehensive Cancer Network guidelines. This is partly related to increased risk for subsequent breast cancer risk, but it may also be important for treatment of ovarian cancer. There are certain medicines that may be more useful than others as part of the care of women with ovarian cancer who have a mutation in BRCA1 or BRCA2.

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