To explore this, we first queried 15 PCa datasets curated on cBioPortal (Cerami et al., 2012; Gao et al., 2013) and identified a high cooccurrence rate (p<0.001, two-sided Fisher’s exact test [FET]) for CIC (10%) and ERF (12%) homozygous and heterozygous deletions (Figure 1C), suggesting that concurrent loss occurs through focal copy number change at the 19q13.2 locus. This evidence concerns the gene ERF and posterior cortical atrophy.