GSTP1 and posterior cortical atrophy: For instance, hypermethylation of the GSTP1 gene occurs in >70% of PCa and has been shown to be useful for its detection (Lee et al, 1994; Esteller et al, 1998; Millar et al, 1999; Santourlidis et al, 1999; Goessl et al, 2001; Jeronimo et al, 2001; Nakayama et al, 2004).