On neoadjuvant therapy for known left breast cancer. I-Spy research MRI #2. There is heterogeneous amount of fibroglandular tissue in both breasts.Mild parenchymal enhancement is noted bilaterally. Bilateral retropectoral silicone implants are present.In the left inner breast, the index enhancing mass near 8:00 now measures 1.4 x 2.1 x 2.8 cm, previously 2.0 x 2.7 x 2.8 cm (LM x CC x AP). Previously noted adjacent small foci/areas of non-mass enhancement are not clearly visualized. Biopsy clip artifact is seen in the mass. This index mass extends posteriorly close to the thin pectoralis muscle overlying the implant. The abnormal non-mass enhancement surrounding a cyst in the lower outer left breast now measures 2.3 x 2.8 x 5.1 cm, previously 2.7 x 3.2 x 5.7 cm. This is also decreased in degree of enhancement. These areas together currently measure 4.4 x 5.2 cm, previously 5.2 x 6.5 cm in the axial plane.No abnormal enhancement is seen in the right breast. The representative node adjacent to the pectoralis minor again measures 1.1 cm in the axial plane. Other lymph nodes are slightly decreased in short axis dimensions. No abnormal axillary lymph nodes are identified in the right axillary region.A port-a-cath is present in the right upper chest wall. A high T2 signal hepatic lesion is partially visualized, likely a benign cyst.
Decrease in size and degree of enhancement of proven malignant lesions as detailed above. BIRADS: 6 - Known cancer.RECOMMENDATION: T - Take Appropriate Action - No Letter.