The U.S. Preventive Services Task Force recommends that routine mammogram screening be limited to women ages 50 to 74, but a study found that 71% of breast cancer deaths between 1990 to 2007 involved women who were not screened two or more years prior to diagnosis. The study looked at 7,301 deceased patients with breast cancer who were diagnosed in the 1990s. Half of the deaths involved women younger than 50 at the time of diagnosis. The findings were published in the journal Cancer.

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