37-year-old with known left breast cancer on neoadjuvant chemotherapy. There is scattered fibroglandular tissue in both breasts.Mild parenchymal enhancement is noted bilaterally.In the left breast, there has been interval decrease of the index mass, which now measures 24 x 27 x 33 mm, previously 102 x 86 x 98 mm (AP x LR x CC). This is peripherally enhancing with central signal compatible with necrosis. The posterior satellite now appears only as faint residual non-mass enhancement measuring 15 mm. The AP extent of the residual mass and non-mass enhancement measures 5.1 cm. Left axillary lymph nodes, including the biopsied node are decreased in size as well. The biopsied node is only 8 mm in short axis. The previously seem smaller suspicious nodes have normalized in morphology. No abnormal enhancement is seen in the right breast. No abnormal lymph nodes are identified in the right axillary region.
Response to therapy as above. Residual mass and non-mass enhancement measure up to 5.1 cm.BIRADS: 6 - Known cancer.RECOMMENDATION: T - Take Appropriate Action - No Letter.