Intracranial atypical meningioma
In the World Health Organization Classification of Tumors of the Central Nervous System 2016 notable changes include the addition of brain invasion as a criterion for atypical meningioma 1).
Brain invasion in atypical meningioma
1)
Louis DN, Perry A, Reifenberger G, von Deimling A, Figarella-Branger D,
Cavenee WK, Ohgaki H, Wiestler OD, Kleihues P, Ellison DW. The 2016 World Health
Organization Classification of Tumors of the Central Nervous System: a summary.
Acta Neuropathol. 2016 Jun;131(6):803-20. doi: 10.1007/s00401-016-1545-1. Review.
PubMed PMID: 27157931.