Importantly, of the 15 studies assessing GSTP1 methylation as a prognostic biomarker, 7 studies did not find any prognostic value in GSTP1 methylation in the prediction of BCR [74,76,79,89,93], low vs. high GS cancers [84] or PCa death [77,82]. The gene discussed is GSTP1; the disease is posterior cortical atrophy.