In the cohort of only CDKN2A intact/wt meningiomas, all meningiomas with PIK3CA or POLR2A mutations were CDKN2Alow cases, whereas the only meningioma with an ARID1A mutation was CDKN2Ahigh (Supplementary Fig. 9a). The gene discussed is CDKN2A; the disease is meningioma.