title: Atypical meningiomas--a case series.
abstract: Meningiomas, in particular the Atypical (grade 2), vary greatly in their behaviour and prognosis. Over a 19 year period, we operated on 169 meningiomas (on 86 patients) and of those, 9 cases of atypical meningiomas were found which met the 2007 World Health Organization (WHO) classification. The 9 patients represented 5.3% of all meningiomas. The average presenting age was 51 years and average follow-up was 103 months with 5 patients passing away between 38 and 219 months after diagnosis. The time to first recurrence was 24 months with 1 patient suffering 12 recurrences and 2 cases having metastases. Although we had a small number of atypical meningiomas, we believe our paper highlights the unpredictable and difficult nature of these tumours.
authors.affiliation: Department of Neurosurgery, Royal Hobart Hospital, GPO Box 1061L, Hobart 7001, Tasmania, Australia.
authors.forename: Marko
authors.initials: M
authors.lastname: Andric
authors.forename: Shreya
authors.initials: S
authors.lastname: Dixit
authors.forename: Arvind
authors.initials: A
authors.lastname: Dubey
authors.forename: Peter
authors.initials: P
authors.lastname: Jessup
authors.forename: Andrew
authors.initials: A
authors.lastname: Hunn
mesh_terms: D000328:Adult; D000368:Aged; D001932:Brain Neoplasms / Q000473:pathology; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007091:Image Processing, Computer-Assisted; D008279:Magnetic Resonance Imaging; D008297:Male; D008579:Meningioma / Q000473:pathology* / Q000532:radiotherapy / Q000601:surgery*; D008875:Middle Aged; D009362:Neoplasm Metastasis; D009364:Neoplasm Recurrence, Local; D018714:Radiotherapy, Adjuvant; D016019:Survival Analysis; D014057:Tomography, X-Ray Computed