title: Unusual appearance of a cisternal hydatid cyst.
abstract: We herein describe a case of an isolated multilocular hydatid cyst occurring in the basilar cisterns, with nondependent levels of different signal intensities shown on MR images. Three portions were visualized on T1-weighted images: the hyperintense inferior aspect, the isointense central part, and the superior aspect of lower signal intensity. The inferior portion was hypointense on T2-weighted images. This unusual appearance was caused by layering of hydatid sand and may represent a characteristic feature of hydatid disease.
authors.affiliation: Department of Radiology, University Hospital Sisters of Mercy, Zagreb, Croatia.
authors.forename: Zoran
authors.initials: Z
authors.lastname: Rumboldt
authors.forename: Hrvoje
authors.initials: H
authors.lastname: Jednacak
authors.forename: Jasna
authors.initials: J
authors.lastname: Talan-Hranilović
authors.forename: Tihana
authors.initials: T
authors.lastname: Rumboldt
authors.forename: Miljenko
authors.initials: M
authors.lastname: Kalousek
mesh_terms: D001927:Brain Diseases / Q000175:diagnosis* / Q000601:surgery; D001933:Brain Stem / Q000473:pathology; D002946:Cisterna Magna / Q000473:pathology* / Q000601:surgery; D004443:Echinococcosis / Q000175:diagnosis* / Q000601:surgery; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D011149:Pons / Q000473:pathology; D013346:Subarachnoid Space / Q000473:pathology; D014057:Tomography, X-Ray Computed