Three-dimensional chemical shift-selective MRI of a ruptured intracranial dermoid cyst.
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.
Nägele
T
T
Department of Neuroradiology, University of Tübingen, Germany.
Klose
U
U
Grodd
W
W
Opitz
H
H
Schick
F
F
Steinbrecher
A
A
Voigt
K
K
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