GSTO1 and cancer: Polymorphisms: A total of 114 SNPs of 21 genes involved in glutathione pathway including GSTO1 rs4925 (C419A), rs11509438 (G622A), GSTO2 rs641071 (-1102 T/G), rs156697 (A424G), and rs3740466 (3′UTR G/A) polymorphismsMain findings:- no significant associations of GSTO polymorphisms and cancer recurrence in patients who underwent to transurethral resection (TUR) alone or in combination with intravesical bacillus Calmette Guérin instillation (BCG) therapy.