Familial Breast Cancer Risk Continues Throughout a Woman's Life

Women who have a sister diagnosed with breast cancer are at an increased risk of developing the disease throughout their lives. The increased risk is most pronounced in younger women, regardless of the age at which the first sister was diagnosed. Women who have a first degree relative affected by breast cancer are at increased risk for the disease, but it is unclear how a woman's risk varies with her current age and the age at which her relative was diagnosed.

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