Study: MRIs delay breast cancer treatment

Doctors at Philadelphia's Chase Research Center studied 577 breast cancer cases. They found 28 percent of patients who had an MRI ended up having a mastectomy versus 19.5 percent among non-MRI cases.

Researchers say patients getting the MRI had a three-week delay in the start of their treatment and higher false-positive incidences from MRIs might be causing some patients to get unnecessary mastectomies.

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