Tumor marker studies revealed an increased level of cancer antigen 19-9 (4,900 U/ml vs. the normal range of <37 U/ml), whereas the levels of β-human chorionic gonadotropin, lactate dehydrogenase, α-fetoprotein, carcinoembryonic antigen and prostate-specific antigen were in the normal range. This evidence concerns the gene KLK3 and neoplasm.