We genotyped four loci of ADAM9 SNPs located in the promoter and intron regions using a TaqMan allelic discrimination assay, including rs10105311 (C/T), rs7006414 (T/C), rs6474526 (T/G), and rs78451751 (T/C) in 702 Taiwanese PCa patients. The gene discussed is ADAM9; the disease is posterior cortical atrophy.