Study: Mammograms may harm some women

Dutch researchers say women with a certain genetic mutation actually boost their cancer risk when they get mammograms and are exposed to low-dose radiation.

They found those women exposed before the age of 20 had two-and-a-half times greater risk.

This finding comes after a controversial government recommendation a couple of weeks ago. Suggesting most women delay starting mammograms from 40 to 50 years old.

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