ERBB2 and triple-negative breast carcinoma: According to immunohistochemistry, molecular subtypes were distributed as follows: Luminal A (n = 56, 32.6%), Luminal B (n = 62, 36.0%), HER2-enriched (n = 28, 16.3%), and triple-negative breast cancer (TNBC, n = 26, 15.1%).