ERBB2 and breast cancer: After further analysis of the expression of MGAT4EP in breast cancer in conjunction with the status of ER, PR, and HER2, univariate analysis revealed a p-value of < 0.001 and an HR of 6.847 (95%CI:2.565–18.277) (Figure 3a), In the multivariate analysis, age, lymph node metastasis (N) and distant metastasis (M), and ER expression status remained statistically significant (p  < 0.05), but the HR for MGAT4EP was, p  = 0.215 (Figure 3b).