In addition, the analysis with only high‐grade BC in TCGA cohort (Fig. 1A, right) indicated that patients with high expression of PHGDH mRNA also had poorer overall survival and disease‐free survival in comparison with patients with low expression (log‐rank P = 0.0081 and 0.0474, respectively; Fig. S2). Here, PHGDH is linked to breast cancer.