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. Here, POLR2A is linked to Psammomatous Meningioma.