Firstly, a formalin-fixed paraffin-embedded (FFPE) tissue microarray (TMA), containing cancerous specimens and adjacent normal tissues from 40–50 EA PCa and 40–50 AA PCa patients, and normal prostate tissues from 3 EA and 3 AA healthy individuals, was used to evaluate whether mTOR is differentially expressed between EA PCa and AA PCa. The gene discussed is MTOR; the disease is posterior cortical atrophy.