ESR1 and breast cancer: As presented in Figure 5B, hsa-let-7b-5p, hsa-let-7a-5p, hsa-let-7c-5p, hsa-let-7f-5p, hsa-miR-26b-5p, hsa-miR-34a-5p, hsa-miR-376c-3p, hsa-miR-30a-5p, hsa-miR-29c-3p, hsa-miR-145-5p, hsa-miR-10a-5p, hsa-miR-10b-5p, hsa-miR-15a-5p, hsa-miR-195-5p, hsa-miR-497-5p, hsa-miR-342-5p, and hsa-miR-338-3p were good prognostic biomarkers for METABRIC ERα positive breast cancer.