TMPRSS2 and head and neck squamous cell carcinoma: We have selected a number of microRNAs candidates (miR-193b-3p; miR-503-5p; miR-455-5p; miR-31-3p; miR-193b-5p; miR-2355-5p) whose expression levels were inversely correlated with Pearson R = 0.50402; 0.4383; R = 0.42242; R = 0.46154; R = 0.42246; R = 0.46644 compared to that of TMPRSS2 expression in TCGA HNSCC tumoral tissues (Fig. 5a).