Figure 3D shows that 13 DE prognostic genes were shared between LGG and GBM (HTR5A, HTR3B, HTR1E, GRM7, GRIN1, GABRG2, GABRB2, GABRA4, GABRA2, GABRA1, DRD1, CHRM3, and ADRA1B). The gene discussed is HTR1E; the disease is glioblastoma.