As an exception, one patient presented with a psammomatous meningioma with a POLR2A mutation (Supplemental Fig. 4), and another patient presented with an angiomatous meningioma with a KLF4 mutation, while yet another patient presented with an atypical meningioma with an AKT1 mutation. The gene discussed is AKT1; the disease is Psammomatous Meningioma.