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Cancer
Caution: Cancer risk elevated in women with dense breasts
But new research offers reassurance that dense breasts don't raise risk of cancer death.
Dense breast tissue can make it harder to see breast cancer on a mammogram. Dense breasts have more glandular and fibrous tissue and less fatty tissue. Past research has found that women with dense breasts are more likely to get breast cancer. Higher blood levels of estrogen raise the risk both of dense breasts and breast cancer, possibly explaining the link. The association is so important that five states have now passed laws requiring that women whose mammograms show dense breasts must be notified of this fact.
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