The injection of Cd-O2/N2 atomized gas further significantly suppressed the expression of SOD1 (C-Blank and C-Control: p < 0.001; C-S-Blank: p < 0.05), SOD2 (C-Control: p < 0.05), and CAT (C-Blank and C-Control: p < 0.01) in the colon tumors of the CC mice. Here, SOD2 is linked to colonic neoplasm.