GSTM1 and neoplasm: The hemoglobin (Hb) level [4,19,20], T-stage [21], tumor volume [4,5,22–24], as well as fluorodeoxyglucose-positron emission tomography (FDG-PET)/CT parameters, including the maximum standardized uptake value (SUVmax), metabolic tumor volume (MTV), and total lesion glycolysis (TLG) [25–27] have been reported to be correlated with local control, but reliable prediction of treatment response remains difficult.