This group exhibited the highest value of progesterone receptor (PgR) expression (Additional file 4: Fig. S6F); a balanced distribution of G2/G3 carcinomas (15/15), PAM50 subtypes (12 luminal-A, 17 luminal-B, 1 HER2-enriched); and HER2 groups (HLBC- = 12, HLBC-2N = 7, and HLBC-2E = 11) (Additional file 4: Fig. S6A-B, Fig. 6). Here, ERBB2 is linked to carcinoma.