KLK3 and cancer: What is more, miR-342-3p (AUC: 0,800; p = 0,006; Sn: 63,6%; Sp: 90%), miR-374b-5p (AUC: 0,768; p = 0,015; Sn: 45,5%; Sp: 90%) and the combination of both miRNAs (AUC: 0,809; p = 0,005; Sn: 54,5%; Sp: 80%) permit the discrimination between a group of men with GS ≥ 7 and a group of men presenting PSA levels > 4 ng/ml without cancer or with GS6.