1.   But the agency cautioned that the device also could increase false alarms over benign lumps, something its manufacturer is still studying.

2.   More often, suspicious spots on a mammogram are biopsied only to turn out to be benign lumps.

3.   They also too often flag benign lumps, causing unnecessary anxiety, additional testing and biopsies.

4.   Those tests often mistake benign lumps for tumors and thus increase risk for unnecessary testing.