Wen you have your first mammogram at a new facility, be sure the radiologist has copies of your previous mammograms. Up to 10% of mammograms result in a false positive reading-the radiologist thinks he/she sees something suspicious when the breast tissue is normal. This can cause undue worry and unnecessary tests and treatments. The rate of false-positives drops by half when radiologists can compare a new mammogram to previous ones to detect changes.

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