ERBB2 and breast neoplasm: Based on the hormone receptor (estrogen receptor (ER), progesterone receptor (PR)), and human epidermal growth factor receptor 2 (HER2) status, the primary breast tumors (N = 10) were mostly hormonal positive (ER+/PR+/HER2+ and ER+/PR+/HER2−, N = 6, 60%) and triple-negative (ER−/PR−/HER2−, N = 3, 30%).