title: Epidermoid of the lateral ventricle: evaluation with diffusion-weighted and diffusion tensor imaging.
abstract: We report of a large epidermoid tumor of the lateral ventricle in a 67-year-old man. Conventional imaging (CT, T1/T2, MRI) could not differentiate the tumor from the surrounding cerebral spinal fluid (CSF). On diffusion-weighted and diffusion anisotropy images the tumor was clearly seen as a hyperintense mass surrounded by hypointense CSF, highly suspected for epidermoid. Diffusion-tensor imaging (DTI) accentuated its lobulated structure and clearly demonstrated its relationship to neighboring white matter tracts. We suggest that in case of the suspicion of a space-occupying lesion in CSF containing areas, not distinguishable from CSF by conventional MR imaging, diffusion-weighted and diffusion-tensor MR imaging should be added.
authors.affiliation: Department of Neurosurgery, Academic Medical Center, P.O. Box 22660, 1100 DD, Amsterdam, Netherlands. c.b.majoie@amc.uva.nl
authors.forename: Radboud W
authors.initials: RW
authors.lastname: Koot
authors.forename: Anuradha P
authors.initials: AP
authors.lastname: Jagtap
authors.forename: Erik M
authors.initials: EM
authors.lastname: Akkerman
authors.forename: Gerard J
authors.initials: GJ
authors.lastname: Den Heeten
authors.forename: Charles B L M
authors.initials: CB
authors.lastname: Majoie
mesh_terms: D000368:Aged; D016880:Anisotropy; D001932:Brain Neoplasms / Q000473:pathology*; D002781:Cholesteatoma / Q000473:pathology*; D038524:Diffusion Magnetic Resonance Imaging; D006801:Humans; D008297:Male; D014057:Tomography, X-Ray Computed