Figure 4: 76-year-old female with history of right breast invasive ductal carcinoma status postlumpectomy. Follow up magnetic resonance imaging 1 month later demonstrated a 7 mm mass at site of prior lumpectomy which was not visualized sonographically but was considered suspicious for residual malignancy. A magnetic resonance imaging guided wire localization was therefore performed and patient went for surgical removal. (a) Precontrast biopsy images demonstrating the suspicious mass in the medial breast (arrow). A grid is noted on the skin laterally. The mass is well positioned in the region of the grid. (b) Postcontrast magnetic resonance axial image for localization purposes demonstrating the enhancing mass (arrow). The mass is well visualized for localization. (c) Axial image demonstrates a needle tip placed immediately adjacent to the enhancing mass (arrow). A wire was subsequently deployed in this region. (d) Postplacement CC mammogram demonstrates the superficial to mid aspect of the thickened segment of the localization wire along the anterior edge of the abnormality.