To confirm that the extracted RNA was reflective of the morphological origin (benign versus PCa), we performed amplification and quantitative PCR on RNA from normal (n = 3) and PCa (n = 3) LCM (RNeasy) samples with primers directed against the metabolic enzyme alpha-methylacyl-coenzyme A racemace (AMACR) and the serine protease hepsin. Here, HPN is linked to posterior cortical atrophy.