Results showed that miR-9-5p was significantly downregulated in tumor tissues (T) compared to healthy adjacent ones (N) in all patients (Figure 8A), and an inverse correlation between miR-9-5p and AR expression was observed in tumor tissues (Figure 8B) validating in patient samples our findings that miR-9-5p is a regulator of AR expression in BC. This evidence concerns the gene AR and breast cancer.