Histological analysis of this cohort showed that 79.6% were IDC, 9,8% infiltrating lobular carcinoma (ILC), 5.3% mucinous carcinoma and 5.3% IMPC (Additional file 3: Table S2).We observed that IMPC is the histological entity with the highest MUC4 expression (Fig. 2c and d). Here, MUC4 is linked to mucinous adenocarcinoma.