SOD1 and central nervous system cancer: The results showed that SOD1 IHC scores were 224 ± 57, 294 ± 51, 238 ± 85, 281 ± 78, 308 ± 55, 314 ± 42 for normal tissues, glioma adjacent tissues, glioma grade I, II, III and IV tissues respectively (Figure 1A).