ERBB2 and breast cancer: Furthermore, it is indicated that low expression of miR‐199b is correlated with poor prognosis, advanced TNM stage, and positive lymph node metastasis in BC.39 Our findings demonstrated that miR‐199b‐5p is down‐regulated in BC tissues compared with non‐tumor counterparts, and deregulation of miR‐199b‐5p is correlated with clinical stage and HER‐2 status.