KLK3 and pachyonychia congenita: Among the 31 patients with localised PC, 16 patients were classified as ‘low-risk patients’ (serum PSA ⩽10 and Gleason score ⩽6) and 15 patients were classified as ‘intermediate or high-risk patients’ (PSA: 10–20 or Gleason score=7 and PSA >20 or Gleason score: 8–10).