Fig 1. Invasive ductal carcinoma in the left breast of a 66-year-old patient with concordance in the human epidermal growth factor receptor 2 (HER2) status between core needle biopsy (HER2 negative) and the surgical specimen (HER2 negative) after neoadjuvant chemotherapy.

A. Mammography shows a spiculated mass in the left breast. B. Ultrasonogram shows a 19-mm hypoechoic mass in the left breast.