title: Three-dimensional chemical shift-selective MRI of a ruptured intracranial dermoid cyst.
abstract: We report a man with a ruptured intracranial dermoid cyst, suffering from headache, nausea, vomiting and a generalised seizure. MRI was performed before and 2 weeks after surgical resection. On T1-weighted images the tumour gave high signal, as did fatty material in the frontal and parietal brain sulci. Identification of this hyper-intense material as lipids was possible by chemical-shift-selective 3D gradient-echo imaging, which provided excellent contrast between the subarachnoid lipids and the adjacent normal brain, with a good spatial resolution. Possible complications of subarachnoid and intraventricular lipid particles after dermoid cyst rupture are discussed and the diagnostic value of 3 D chemical-shift-selective additional to conventional T-1-weighted spin-echo images in identification of even small amounts of fat is emphasised.
authors.affiliation: Department of Neuroradiology, University of Tübingen, Germany.
authors.forename: T
authors.initials: T
authors.lastname: Nägele
authors.forename: U
authors.initials: U
authors.lastname: Klose
authors.forename: W
authors.initials: W
authors.lastname: Grodd
authors.forename: H
authors.initials: H
authors.lastname: Opitz
authors.forename: F
authors.initials: F
authors.lastname: Schick
authors.forename: A
authors.initials: A
authors.lastname: Steinbrecher
authors.forename: K
authors.initials: K
authors.lastname: Voigt
mesh_terms: D000328:Adult; D001932:Brain Neoplasms / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery; D002540:Cerebral Cortex / Q000473:pathology / Q000601:surgery; D003884:Dermoid Cyst / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000295:instrumentation*; D050356:Lipid Metabolism; D008279:Magnetic Resonance Imaging / Q000295:instrumentation*; D008297:Male; D012422:Rupture, Spontaneous