Figure 2

HER2 breast cancer of left breast in 71-year-old woman. Prior to NAC, dynamic MR images obtained at 60 s (a), 240 s (b), and 300 s (c) after administration of gadolinium show a strong and washout enhancing mass with a smooth border. Tumor extension around the mass is shown in Figure 2b. After the completion of NAC, there is no longer recognizable tumor on dynamic MR image obtained at 300 s (d).