ESR1 and breast ductal adenocarcinoma: The data showed ten cases of triple negative ductal carcinomas metastatic to the pancreas, followed by three lobular carcinomas with ER+, PR+, HER2, three ductal carcinomas with ER+, PR‐, HER2‐, three lobular carcinomas with ER+, PR+, two lobular carcinomas with ER+, and the rest cases consisting of one case of either ductal carcinoma or lobular carcinoma with the rest patterns of biomarkers listed in Table 4.