(72) compared the expression of AGR2 in metastatic patients and non-metastatic patients by counting the expression of AGR2 antibody on ELISA through cross-sectional observation study, and found that the average value of metastatic AGR2 was significantly higher than that of non-metastatic patients, 3.77 ng/dl and 1.76 ng/dl respectively (P <0.01), which also confirmed that AGR2 expression was associated with breast cancer metastasis. Here, AGR2 is linked to breast carcinoma.