“…Oxidative gene polymorphism and brain tumor risk seems to be associated, the increased risk of glioma and meningioma type brain tumors were found to be related with variants in some antioxidant enzyme genes and in a study, MnSOD tissue expression is said to be a prognostic marker for glioblastoma. Superoxide dismutase (SOD) and glutathione peroxidase (GPx) activities showed a clear decrease pro-portionally with tumor malignancy, decrease of SOD activity with the increasing grades of malignancy in brain tumors were implied [45,46].…”