PIK3R2 and central nervous system cancer: There were 18 leading Edge Num in the Glioma pathway, such as AKT1, ARAF, CALM1,CCND1,E2F3,IGF1R, MAP2K2, MAPK1, PIK3CA,PIK3R1,PIK3R2,PLCG1,PRKCA,RAF1,SHC2,SHC3, SOS2 and TP53 (Figure 10F).