KLK14 and posterior cortical atrophy: This study highlights that KLK14 expression is elevated in high Gleason score PCa and in PCa‐derived metastases, as well as a negative association between KLK14 expression levels and DFP confirming previous reports suggesting an association between KLK14 and PCa aggressiveness (Lose et al., 2012; Rabien et al., 2008; Rose et al., 2018; Yousef et al., 2003).