ERG and posterior cortical atrophy: On the other hand, although the expression of HIST1H4L was not significantly different between PCa in general and NPT (Figure 3B), PCa ERG+ presented higher HIST1H4L expression levels when compared to PCa oETS+ (median 3.0 fold increase), PCa ETS− (median 1.9 fold increase) and NPT (median 2.1 fold increase) (Figure 4A).