title: [Intracranial extracerebral glioma].
abstract: A case of solitary leptomeningeal extracerebral glioma is reported. A 75-year-old man was admitted to our hospital because of headache and right hemiparesis. CT scan and carotid angiography revealed a tumor in the left convexity. At operation, the tumor was located between the dura mater and the arachnoid membrane and adhered to the brain surface only in a limited area. Histological study including immunostain and electron microscopy showed the tumor as anaplastic oligo-astrocytoma. We speculate that our case may originate from a heterotopic glial nest in the dural border cell layer of dura mater. This explanation seems likely because the tumor was located mostly in the subdural space.
authors.affiliation: Department of Neurosurgery, Kawasaki City Ida Hospital.
authors.forename: H
authors.initials: H
authors.lastname: Oka
authors.forename: N
authors.initials: N
authors.lastname: Kawano
authors.forename: S
authors.initials: S
authors.lastname: Morii
authors.forename: T
authors.initials: T
authors.lastname: Suwa
authors.forename: K
authors.initials: K
authors.lastname: Irikura
authors.forename: T
authors.initials: T
authors.lastname: Saitoh
mesh_terms: D000368:Aged; D001921:Brain / Q000000981:diagnostic imaging; D002533:Cerebral Angiography; D005910:Glioma / Q000473:pathology* / Q000648:ultrastructure; D006801:Humans; D007150:Immunohistochemistry; D008297:Male; D008577:Meningeal Neoplasms / Q000473:pathology* / Q000648:ultrastructure; D008854:Microscopy, Electron; D014057:Tomography, X-Ray Computed