Numerous types of biomolecules have been proposed as PCa biomarkers, including metabolites (i.e., sarcosine), proteins (i.e., prostate-specific antigen), RNAs (i.e., transmembrane protease serine 2-ETS-related gene fusion), and glycans [12,13,14,15]. This evidence concerns the gene KLK3 and posterior cortical atrophy.