To determine whether FABP7 and HMGCS2 are exclusively expressed by apocrine carcinoma we analyzed expression patterns of these putative biomarkers in a set of 205 non-apocrine breast tumors: 42 TNBC (21%), 103 Luminal A (50,2%), 17 Luminal B (8,3%) and 43 HER2+ (20,5%) contained in three commercially available tissue microarrays (BRC1501, 1502, and 1503; Pantomics Inc.)(Figure 6, Table S5). Here, ERBB2 is linked to apocrine adenocarcinoma.