The following clinical data were collected from the electronic medical records: age (years), tumor size at baseline MRI (cm), clinical T stage (1–4), clinical N stage (0–3), estrogen receptor (ER) status (negative or positive), progesterone receptor (PR) status (negative or positive), HER2 status (negative or positive), Ki-67 index (%), histologic grade (low or intermediate vs. high), and histologic type (ductal vs. others). The gene discussed is ERBB2; the disease is neoplasm.