The ERG (ETS‐related gene 1) gene belongs to the ETS family of transcription factors and is fused with the prostate‐specific and androgen‐responsive TMPRSS2 (transmembrane protease, serine 2) gene in approximately 50% of PCa cases, resulting in ERG overexpression.11 This evidence concerns the gene TMPRSS2 and posterior cortical atrophy.