53 year old woman with known left breast cancer and metastatic left axillary lymph node, status post neoadjuvant chemotherapy. There is scattered fibroglandular tissue in both breasts.Mild parenchymal enhancement is noted bilaterally.The index cancer in the left breast at 1:00 position now measures 7 x 9 x 7 mm (AP x LR x CC). It is significantly reduced in size when compared to the prior measurement (20 x 20 x 19 mm). A Hydromark clip is present approximately 5 mm lateral to the index cancer. The satellite lesion seen on the prior exam at central left breast is no longer visualized. Only a metallic artifact from marker clip is seen.An enlarged left axillary lymph node becomes smaller, measuring 17 x 8 mm (previous measurement: 34 x 19 mm). A Hydromark clip is identified at the anterior aspect within the lymph node.In the right breast, a benign mass at 9:00 position is unchanged.No new abnormal enhancement is seen in either breast. No abnormal lymph nodes are identified in right axillary region.
1. Interval decrease in size of index cancer in the left breast and left metastatic axillary lymph node, and complete resolution of satellite lesion in the left breast.2. No interval change in the right benign mass.BIRADS: 6 - Known cancer.RECOMMENDATION: X - No Letter.