63-year-old female with new grouped amorphous calcifications (arrows) at 4 o'clock within the left breast anteriorly for which stereotactic vacuum-assisted biopsy was recommended. (a, b) The calcifications were biopsied and a MammoMARK™ (Mammotome, Cincinnati, OH) was deployed. Immediate post-procedure mammogram images reveal 40 mm of medial displacement from the biopsy cavity (c, d). LCC, left craniocaudal view; LML, left mediolateral view.