The ERG oncogene is known to be overexpressed in more than 50% of PCa cases, and ERG overexpression is induced by fusion with TMPRSS2, a prostate‐specific and androgen‐regulating gene, and TMPRSS2‐ERG gene fusion is a mutation found in 40%–70% of PCa cases.45, 46, 47. This evidence concerns the gene TMPRSS2 and posterior cortical atrophy.