Aberrant serum PSA glycosylation (S2, 3PSA), progensa PCA3 assay, transmembrane protease serine 2 (TMPRSS2)- erythroblastosis virus E26 oncogene homolog (ERG) fusion gene, Mi-prostate score (MiPS), oncotype DX test, prolaris test, decipher genomic classifier (decipher GC), ProMark, Core 2 β-1,6-N-acetylglucosaminyltransferase-1 (GCNT1), circulating tumor cells (CTCs), urokinase plasminogen activator (uPA). The gene discussed is KLK3; the disease is neoplasm.