MRI results in a woman 52 years old with recent diagnosis of right breast cancer. Left mammogram negative. Pre-contrast (a) and post-contrast (b) enhanced sagittal MR images reveal an 8 mm enhancing mass at 12 o'clock in the left breast (arrowed). Core needle biopsy confirmed infiltrating ductal carcinoma. Final pathology from lumpectomy demonstrated an 8 mm infiltrating ductal carcinoma; sentinel lymph node negative.