KLK3 and neoplasm: Tumor markers: Alpha-fetoprotein (AFP) 6.1 ng/mL (<10.0), protein induced by vitamin K absence-II 36 mAU/mL (<40), carcinoembryonic antigen (CEA) 2.1 ng/mL (<5.0), carbohydrate antigen 19-9 (CA19-9) 12.7 U/mL (<37), prostate-specific antigen (PSA) 4.56 ng/mL (<4), SCC 1.0 ng/mL (<1.5), cytokeratin fragment (cyfra) 2.5 ng/mL (<3.5) (Table 1).