KLK3 and posterior cortical atrophy: In this study, we used agarose bound AAL beads to enrich Fuc-PSA from patient sera, therefore, the observed diagnostic value of serum Fuc-PSA in the detection of AG PCa could be attributed to both core fucosylation and terminal fucosylation of PSA, even though it has been reported that PSA fucosylation mainly occurs in the core glycan structure 42-44.