An analysis of these carcinomas showed that PyMT-VE-CadhSnail1CT tumors exhibited a higher HER2 expression with respect to PyMT-VE-CadhSnail1KO tumors, whereas estrogen receptor expression was retained at a greater level in PyMT-VE-CadhSnail1KO tumors (Figure 5D). Here, ESR1 is linked to carcinoma.