ERG and posterior cortical atrophy: BRD9 is overexpressed in ERG positive PCa in the Barbieri (p = 0.0024) and Gerhauser (p = 0.0054) cohorts; however, there was no significant difference in BRD9 expression in the Taylor (p = 0.1790) and Abida (p = 0.1304) cohorts (Figure 6C–F).