ESR1 and neoplasm: Whereas, miR-9-3p expression positively correlated with ki67/miB1 stained cells (r = 0.20, p = 0.042) and negatively correlated with age (r = −0.21 p = 0.022), tumour dimension (r = −0.21 p = 0.019) and ER expression (r = −0.25; p = 0.005).