45-year-old with history of right breast cancer on neoadjuvant chemotherapy. Please assess response. The patient also palpates a superficial mass in the left outer breast for which ultrasound is requested. A targeted bilateral ultrasound was performed for the known cancer and also the patient's area of concern. In the right breast 9 o'clock position at the site of the Hydromark biopsy clip, there is a residual hypoechoic area measuring 0.6 x 0.5 x 0.5 cm. This has no significant Doppler vascularity. Previously this measured 0.8 x 0.7 x 0.8 cm on 1/6/2015, 1.1 x 1.0 x 0.7 cm on 12/1/2014, and 2.5 x 1.2 x 1.6 cm before therapy. In the left breast at the site of patient concern, a 5-mm simple cyst was seen. This correlates with the MRI which showed cysts scattered in the left breast.
1. Minimal remaining soft tissue density adjacent to the Hydromark biopsy clip could represent a small focus of residual tumor versus fibrosis/scarring.2. Left breast simple cyst.BIRADS: 6 - Known cancer.RECOMMENDATION: T - Take Appropriate Action - No Letter.