title: Atypical and malignant meningiomas: evaluation of different radiological criteria based on CT and MRI.
abstract: The following are our results of a retrospective analysis of 214 patients, operated on meningiomas, in order to investigate radiological criteria of malignancy. Among these cases there were 31 patients with a histologically confirmed diagnosis of malignant subtypes. As uncertain signs of malignancy of ensuing radiological features are an irregular enhancement of contrast-media and the size of cerebral edema. Based upon CT and MR images we have developed a standardised, computerised evaluation method which enables us to study in detail the internal architecture of meningiomas.
authors: Clinic of Neurosurgery, University of Göttingen, Federal Republic of Germany.
authors: R
authors: R
authors: Verheggen
authors: M
authors: M
authors: Finkenstaedt
authors: V
authors: V
authors: Bockermann
authors: E
authors: E
authors: Markakis
mesh_terms: D000328:Adult; D001921:Brain / Q000473:pathology; D005260:Female; D006801:Humans; D007089:Image Enhancement; D007091:Image Processing, Computer-Assisted; D008279:Magnetic Resonance Imaging; D008577:Meningeal Neoplasms / Q000145:classification / Q000175:diagnosis* / Q000601:surgery; D008579:Meningioma / Q000145:classification / Q000175:diagnosis* / Q000601:surgery; D008875:Middle Aged; D012189:Retrospective Studies; D014057:Tomography, X-Ray Computed