Malignant meningioma of the lateral ventricle. Case report

Neurosurg Focus. 2003 Oct 15;15(4):ECP2. doi: 10.3171/foc.2003.15.4.8.


This 65-year-old man presented with a very rare malignant meningioma in the trigonum of the right lateral ventricle. Neurological examination showed bilateral papilledema. Magnetic resonance imaging revealed a solid, enhancing tumor in the right trigonum with a hypointense cystic component located in the center of the tumor. The lesion was totally resected via a superior parietooccipital transcortical approach. Histological examination showed an anaplastic (malignant) meningioma with architectural disarray, high mitotic activity (20/10 hpf), necrosis, and cytological atypism. As in our case, heterogeneous signal, due to necrotic tissue and frequently demonstrated on both T1- and T2-weighted sequences, is suggestive of an aggressive type of meningioma.

Publication types

  • Case Reports

MeSH terms

  • Aged
  • Cerebral Ventricle Neoplasms / pathology*
  • Cerebral Ventricle Neoplasms / surgery
  • Humans
  • Lateral Ventricles / pathology*
  • Lateral Ventricles / surgery
  • Magnetic Resonance Imaging
  • Male
  • Meningeal Neoplasms / pathology*
  • Meningeal Neoplasms / surgery
  • Meningioma / pathology*
  • Meningioma / surgery
  • Mitotic Index
  • Necrosis
  • Neoplasm Invasiveness