The Kaplan–Meier curves (Fig. 6C) and log‐rank test showed that patients overexpressing VDR‐CYP24A1‐ERRα genes had a significantly worse survival than the other group (P value = 0.017), clearly indicating a prognostic value of such a biomarker signature for basal‐like breast cancer. This evidence concerns the gene VDR and breast carcinoma.