67-year-old female with right breast invasive ductal carcinoma and ductal carcinoma in-situ.
Findings: (a, b) The known complex solid and cystic mass demonstrates interval decreased size of the cystic component with persistent, though less vascular, soft tissue component along the periphery (arrows).
Technique: Ultrasound and Color Doppler using a high frequency linear transducer (13 MHz) after the completion of neoadjuvant chemotherapy.