ERBB2 and neoplasm: In comparison with FBC, HR-/HER2+ MBC tended to be lower in histologic grade (III-IV, 58.6% vs. 68.3%, P=0.008) and tumor size (>5 cm, 13.8% vs. 19.8%, P<0.0001), which is consistent with HR-/HER2- MBC (histologic grade, III-IV, 67.7% vs. 75.6%, P=0.008; tumor size, >5 cm, 7.7% vs. 15.3%, P<0.0001).