KLK3 and neoplasm: At presentation, levels of serum tumor markers were obtained: α-fetoprotein (AFP) was found to be elevated to 1,740.9 ug/l (normal less than 10 ng/ml); serum β-human chorionic gonadotropin (β-hCG) (normal less than 10 mIU/ml) and prostate-specific antigen (PSA) (normal less than 4.0 ng/ml) were within normal range.