± 7.9 pg/mL) were significantly higher than those of younger ER-positive patients (75.7 ± 6.6 pg/mL, P < 0.0001; Table 1).The serum concentrations of sST2 in ER-positive breast cancer patients were not correlated with lymphonodus status (P > 0.05; Table 1).The serum concentrations of IL-33 and VEGF in breast cancer patients were not correlated with age, histological type, tumor size, lymphonodus status, or stage (P > 0.05). Here, ESR1 is linked to breast cancer.