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Fig. 1D. —73-year-old woman with history of benign percutaneous right breast biopsy using 11-gauge directional vacuum-assisted technique. Craniocaudal (C) and mediolateral oblique (D) right mammograms obtained 6 months after percutaneous biopsy show 7-mm spiculated density on C and no perceptible density on D. Metallic clip marks biopsy site. Slight increase in density of background scattered fibroglandular tissue is presumed related to hormone replacement therapy that was started 6 months before these mammograms were obtained. Calcification inferior to metallic clip on D is situated 8 cm medial to biopsied calcifications. Punctate opacity anterior to metallic clip on D represents artifact.