ERBB2 and breast cancer: Among the 75 BC patients, 20 (26.7%) achieved pCR after surgery: 23.8% (5/21) of patients with HER2-positive BC achieved pCR, 38.9% (7/18) of TNBC patients achieved pCR, and 22.2% (8/36) of patients with luminal BC achieved pCR.