GABRG1 and medulloblastoma: GABR expression between subgroups and within some subgroups is variable: (i) WNT subgroup subtypes (α and β) have high expression of GABRG3 and GABRE; (ii) SHHγ subtype has high expression of several GABR genes that distinguish it from SHHα, SHHβ, SHHδ, while all SHH subgroup patients have high expression of GABRA2 and GABRG1. Medulloblastoma patients with poorest prognosis are group 3.