FIGURE 2:

a: A 44-year-old woman (Table 1, No. 11) with screening mammogram detected grouped amorphous calcification (BIR-ADS 4a) in the left upper outer quadrant (arrow). b: The stereotactic biopsy with 9G core needle was performed for calcifications and six core samples were obtained. The pathologic result was a single focus of ADH. Postbiopsy mammogram showed biopsy clip with no residual calcifications. c: Axial T₁-weighted contrast-enhanced subtracted MR image 43 days after biopsy showed clip artifact with no suspicious enhancement (arrow). Surgical pathology showed rare foci of ADH with flat epithelial atypia (FEA). The MRI finding is a true-negative.