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MIAMI _ A flawed gene may account for more breast cancer than previously known, according to two new studies being published today. The work is bringing doctors more information about who should receive genetic screening and how the results should be used.
In Thursday's issue of The New England Journal of Medicine, studies show that a cross-section of women who were diagnosed with breast cancer before age 40 have a mutation in the breast cancer gene known as BRCA1, regardless of family history of cancer. In fast-moving genetics research to date, the flaw was looked for, and therefore found, only in women with a strong family history of breast cancer.
Inherited breast cancer accounts for only about 5 percent of the 184,300 women found to have breast cancer each year, according to the…