We noted that there were strong positive correlations in PCa and BPH groups between leptin and VEGF (RS = 0.722, p < 0.01; RS = 0.802, p < 0.01) and VEGF and HGF (RS = 0.845, p < 0.01; RS = 0.775, p < 0.01). Here, HGF is linked to benign prostatic hyperplasia.