ERBB2 and breast cancer: The molecular subtypes of breast cancer identified were as follows: Luminal A (n = 14, 7.4%), Luminal B (HER2-negative; n = 81, 42.4%), triple-negative (n = 76, 39.8%), Luminal B (HER2-positive; n = 14, 7.3%), and HER2-positive (n = 6, 3.14%).