title: Malignant meningioma of the lateral ventricle. Case report.
abstract: 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.
authors.affiliation: Department of Neurosurgery, Cukurova University School of Medicine, Balcali, Adana, Turkey. ermant@cu.edu.tr
authors.forename: Tahsin
authors.initials: T
authors.lastname: Erman
authors.forename: A Iskender
authors.initials: AI
authors.lastname: Göçer
authors.forename: Metin
authors.initials: M
authors.lastname: Tuna
authors.forename: Seyda
authors.initials: S
authors.lastname: Erdoğan
authors.forename: Suzan
authors.initials: S
authors.lastname: Zorludemir
mesh_terms: D000368:Aged; D002551:Cerebral Ventricle Neoplasms / Q000473:pathology* / Q000601:surgery; D006801:Humans; D020547:Lateral Ventricles / Q000473:pathology* / Q000601:surgery; D008279:Magnetic Resonance Imaging; D008297:Male; D008577:Meningeal Neoplasms / Q000473:pathology* / Q000601:surgery; D008579:Meningioma / Q000473:pathology* / Q000601:surgery; D008940:Mitotic Index; D009336:Necrosis; D009361:Neoplasm Invasiveness