title: Glioependymal cysts: CT and MR findings.
abstract: Four patients with intracranial glioependymal cysts were evaluated in our institution in the last 7 years. All underwent surgical drainage and biopsy of the cyst wall. Cranial CT revealed a uniformly hypodense lesion with no contrast enhancement in all cases. Magnetic resonance imaging studies revealed a well defined cyst that was isointense to CSF on T1-weighted images and iso- or mildly hyperintense to CSF on proton density and T2-weighted images. In one case, a fluid-fluid level was demonstrated within the cavity, indicating the presence of fluid with a high protein content. A diagnosis of glioependymal cysts can be suggested based on CSF-like intensity patterns on T1-weighted images and iso- or mild hyperintensity on T2-weighted images.
authors.affiliation: Department of Radiology, Montreal Neurological Hospital, Quebec, Canada.
authors.forename: A
authors.initials: A
authors.lastname: Ismail
authors.forename: D
authors.initials: D
authors.lastname: Tampieri
authors.forename: D
authors.initials: D
authors.lastname: Melanson
authors.forename: R
authors.initials: R
authors.lastname: Pokrupa
authors.forename: J G
authors.initials: JG
authors.lastname: Villemure
authors.forename: G
authors.initials: G
authors.lastname: Bertrand
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001927:Brain Diseases / Q000175:diagnosis* / Q000000981:diagnostic imaging*; D002552:Cerebral Ventricles / Q000473:pathology; D003560:Cysts / Q000175:diagnosis* / Q000000981:diagnostic imaging*; D004805:Ependyma / Q000000981:diagnostic imaging / Q000473:pathology; D005260:Female; D005625:Frontal Lobe / Q000000981:diagnostic imaging / Q000473:pathology; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D010296:Parietal Lobe / Q000000981:diagnostic imaging / Q000473:pathology; D014057:Tomography, X-Ray Computed