title: Haemangiopericytoma: a clinical and radiological comparison with atypical meningiomas.
abstract: A small number of haemangiopericytomas (HPCs) are compared with a group of cases labelled as atypical meningiomas (AMs) extracted from our records over a 10-year period. There was close convergence between the two groups in terms of clinical presentation. Radiologically, they were quite different. HPCs subjected to angiography demonstrated a major vascular supply from branches of the internal carotid or vertebral arteries, whereas this was not a feature of the meningioma group. Half the HPCs arose from the lateral petrosal attachment of the tentorium; all the meningiomas were parasagittal. The HPCs did not prove to be more formidable technical challenges than the meningiomas: the operative blood loss was much the same in both. The same number of recurrences and deaths occurred in the two groups at approximately the same interval during the follow-up period, making both conditions equally grave in terms of prognosis.
authors.affiliation: Department of Neurosurgery, Atkinson Morley's Hospital, Wimbledon, UK.
authors.forename: D
authors.initials: D
authors.lastname: Uttley
authors.forename: A C
authors.initials: AC
authors.lastname: Clifton
authors.forename: P R
authors.initials: PR
authors.lastname: Wilkins
mesh_terms: D000328:Adult; D001921:Brain / Q000000981:diagnostic imaging* / Q000473:pathology* / Q000601:surgery; D001932:Brain Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology* / Q000601:surgery; D002533:Cerebral Angiography; D005260:Female; D006393:Hemangiopericytoma / Q000000981:diagnostic imaging* / Q000473:pathology* / Q000601:surgery; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008579:Meningioma / Q000000981:diagnostic imaging* / Q000473:pathology* / Q000601:surgery; D011183:Postoperative Complications; D011379:Prognosis