NDLI: Magnetic resonance diffusion tensor imaging and tractography of intracranial cavernous malformations: preliminary observations and characterization of the hemosiderin rim.

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Year: 2010 Volume: 112 Issue: 3

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Year: 2010 Volume: 112 Issue: 1

Year: 2009 Volume: 111

Magnetic resonance diffusion tensor imaging and tractography of intracranial cavernous malformations: preliminary observations and characterization of the hemosiderin rim.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Cauley, Keith A. Andrews, Trevor Gonyea, Jay V. Filippi, Christopher G.
Description	Country affiliation: United States Author Affiliation: Cauley KA ( Department of Radiology, Division of Neuroradiology, University of Massachusetts Medical Center, Worcester, Massachusetts 01655, USA. keithcauley@hotmail.com)
Abstract	OBJECT: Cavernous malformations (CMs) can cause symptoms that appear out of proportion to the lesion size, leading one to hypothesize that they may have an effect on adjacent white matter that is not fully explained by local mass effect. The goal of this study was to investigate the diffusion tensor (DT) properties of CMs, the hemosiderin rim, and normal-appearing adjacent white matter. METHODS: Eighteen cavernous malformations were characterized using standard MR imaging sequences as well as 6-direction DT imaging with single-shot echo planar-gradient echo imaging at 3 tesla. RESULTS: Diffusion tensor imaging demonstrated that CMs have a characteristic signature on DT imaging, with low fractional anisotropy (FA) and high mean diffusivity centrally within the lesion. The hemosiderin rim had a high FA value relative to the central lesion or adjacent white matter. Tractography revealed that tracts neatly deviate around CMs. Tracts were typically seen to pass through the hemosiderin rim. CONCLUSIONS: The hemosiderin rim of CMs was intimately associated with white matter tracts that were deviated by the central lesion. These findings are consistent with histopathological reports that the hemosiderin rim is composed of blood breakdown products deposited in viable white matter.
File Format	HTM / HTML
ISSN	00223085
e-ISSN	19330693
Journal	Journal of Neurosurgery
Issue Number	4
Volume Number	112
Language	English
Publisher	American Association of Neurological Surgeons
Publisher Date	2010-04-01
Publisher Place	United States
Access Restriction	Open
Subject Keyword	Discipline Neurosurgery Diffusion Tensor Imaging Echo-planar Imaging Hemangioma, Cavernous, Central Nervous System Metabolism Pathology Hemosiderin Adolescent Nerve Fibers, Myelinated Pilot Projects
Content Type	Text
Resource Type	Article
Subject	Neurology (clinical) Surgery

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