Subtypes

 angiomatous meningioma (meningiomas whose vascular component exceeded 50% of the total tumor) (#15104303#)
 aggressive meningioma
 undifferentiated meningeal sarcoma

References

 Perry A, Gutmann DH, Reifenberger G. Molecular pathogenesis of meningiomas. J Neurooncol. 2004 Nov;70(2):183-202. PMID: #15674477#

 Lamszus K, Kluwe L, Matschke J, Meissner H, Laas R, Westphal M. Allelic losses at 1p, 9q, 10q, 14q, and 22q in the progression of aggressive meningiomas and undifferentiated meningeal sarcomas. Cancer Genet Cytogenet. 1999 Apr 15;110(2):103-10. PMID: #10214357#