TMPRSS2 and posterior cortical atrophy: In the PCa EV samples, the three probes—‘TMPRSS2:ERG’, ‘ERG_Exon_4-5’ and ‘ERG_Exon_6-7’ probe—were above the threshold in 22/40, 23/40 and 26/40 PCa samples, respectively and 95% of the TMPRSS2:ERG-positive samples were positive for ERG_Exon_4-5 and 90% for ERG_Exon_6-7, with 19/40 PCa samples triple-positive for all three probes in the EV fraction.