ST6GalNAc1 expression showed an average mean fold change of 2.951 (p = 5.18E-7) in 122 primary PCa samples studied by Grasso et al. [10], and a mean fold change of 4.049 (p = 1.99E-6) in samples studied by Varambally et al. [17], with ST6GalNAc1 ranked in the top 1% of over-expressed genes. The gene discussed is ST6GALNAC1; the disease is posterior cortical atrophy.