Furthermore, miR‐141 expression level in BC tissues correlated negatively with tumor stage, lymph node metastasis, and expression levels of HER2, PCNA, and Ki67 (Table 1), while there was no significant correlation between miR‐141 expression and patient age, tumor size, tumor grade, ER, or PR expression levels (data not shown). The gene discussed is ESR1; the disease is breast cancer.