KLK3 and pachyonychia congenita: Where 66 patients with newly diagnosed PC were classified into two risk groups: 40 patients with low-grade (Gleason score (GS) 6 or 7 and serum PSA < 20 ng/mL) and 26 patients with high-grade PC (GS ≥ 7 and serum PSA ≥ 20 ng/mL).