PIK3CA and meningioma: Meningioma‐relevant mutations were present in 90/126 (71.4%) specimens including NF2, TRAF7, KLF4, SMO, AKT1,TERT promotor, ARID,SUFU, and PIK3CA mutations in similar frequencies compared to previous studies (6, 11, 12, 14, 19, 20, 21).