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AJNR - American Journal of Neuroradiology

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American Journal of Neuroradiology 28:283-284, February 2007
© 2007 American Society of Neuroradiology

Case Report
BRAIN

Multiple Prominent Dilated Perivascular Spaces Do Not Induce Wallerian Degeneration as Evaluated by Diffusion Tensor Imaging

M. Akter^a, T. Hirai^a, M. Kitajima^a, K. Yamada^b, Y. Hayashida^a, T. Okuda^a, H. Takeshima^b, J. Kuratsu^b and Y. Yamashita^a

^a Department of Diagnostic Radiology, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
^b Department of Neurosurgery, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan

Address correspondence to Toshinori Hirai, MD, Department of Diagnostic Radiology, Graduate School of Medical Sciences, Kumamoto University, 1-1-1 Honjo Kumamoto 860-8556, Japan; e-mail: t-hirai{at}kaiju.medic.kumamoto-u.ac.jp

SUMMARY: It is unknown whether dilated perivascular spaces can affect the adjacent neuronal fibers. We describe conventional MR and diffusion tensor imaging findings of a case with multiple, prominent dilated perivascular spaces in the left cerebral hemisphere. Diffusion tensor imaging showed no alterations in the fractional anisotropy and apparent diffusion coefficient values for the corona radiata, posterior rim of the internal capsule, and the cerebral peduncle, indicating no wallerian degeneration associated with dilated perivascular spaces.