KLF4 and meningioma: Molecular analysis revealed that there were 152 NF2 meningiomas (54.1%) and non-NF2 meningiomas: 45.9% (129 cases) including “AKT1”: 11.4% (32 cases), “KLF4”:5.7% (16 cases), “POLR2A”:16 cases (5.7%), “SMO”: 0.7% (2 cases), and others:22.1% (62 cases) (Table 1, Additional file 1: Table S1).