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Women with deleterious mutations in either the BRCA1 or BRCA2 genes have a high risk of developing breast and/or ovarian cancer.Because different studies look at different populations, and because different types of mutations have somewhat different risks, the risk is best expressed as a range, rather than a single number.
Only about 3%–8% of all women with breast cancer carry a mutation in BRCA1 or BRCA2. [70] Similarly, BRCA1 mutations are only seen in about 18% of ovarian cancers (13% germline mutations and 5% somatic mutations). [71] Thus, while BRCA1 expression is low in the majority of these cancers, BRCA1 mutation is not a major cause of reduced ...
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.
For people with a BRCA1 mutation, guidelines recommend routine breast imaging to detect early signs of breast cancer beginning at age 25. Screening may start sooner for people with a family member ...
The lifetime risk of a female developing breast and/or ovarian cancer increases if she inherits a harmful mutation of BRCA1 or BRCA2, but the severity depends on the type of mutation. [8] Each year, about 3% of breast cancers and 10% of ovarian cancers result from inherited mutations in the BRCA1 and BRCA2 genes. [9]
You’ve had genetic testing and have a known BRCA1 or BRCA2 gene mutation or have a first-degree relative (parent, brother, sister, or child) with a BRCA1 or BRCA2 gene mutation
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