NF2 and meningioma: EMA immunoreactivity, strong and diffuse SSTR2A immunoreactivity and the presence of classic copy-number alterations of NF2-mutant meningioma, such as monosomy 22/22q in lower-grade meningiomas, with additional losses of 1p, 6, 10q, 14q and/or 18 in higher-grade meningiomas, are also desirable in the diagnostic process.