GSTP1 and cancer: Regarding GSTP1 polymorphisms, whose gene is located on chromosome 11 (11q13.2) [16], two commonly occurring polymorphisms within the exon 5/6 region of the gene (rs1695 c.313A > G, p.IIe105Val and rs1138272 c.341C > T, p.Ala114Val) may be related to the occurrence and development of various cancers [17,18,19,20,21].