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Approximately 50% to 65% of women born with a deleterious mutation in BRCA1 will develop breast cancer by age 70, and 35% to 46% will develop ovarian cancer by age 70. Approximately 40% to 57% of women with a deleterious mutation in BRCA2 will develop breast cancer by age 70, and 13% to 23% will develop ovarian cancer by age 70.
In addition to breast cancer in men and women, mutations in BRCA2 also lead to an increased risk of ovarian, uterine tube, prostate and pancreatic cancer. In some studies, mutations in the central part of the gene have been associated with a higher risk of ovarian cancer and a lower risk of prostate cancer than mutations in other parts of the gene.
Prophylactic salpingo-oophorectomy (removal of the ovaries and fallopian tubes to prevent cancer) is recommended at age 35-40 for people with BRCA1 mutations and at age 40-45 for people with BRCA2 mutations. [6] An increasing number women who test positive for faulty BRCA1 or BRCA2 genes choose to have risk-reducing surgery. At the same time ...
A new study is raising fresh questions about the value of breast cancer screening in older women, finding that those 70 and older who underwent mammograms were more apt to be diagnosed with tumors ...
Women with hereditary nonpolyposis colon cancer (Lynch syndrome), and those with BRCA-1 and BRCA-2 genetic abnormalities are at increased risk. The major genetic risk factor for ovarian cancer is a mutation in BRCA1 or BRCA2 genes, or in DNA mismatch repair genes, which is present in 10% of ovarian cancer cases.
A BRCA2 gene mutation is associated with breast cancer, but it can also raise the risk of other cancers. Woman shares story of her pancreatic cancer diagnosis.
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