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MR Imaging Findings in Cauda Equina Gnathostomiasis

Kittisak Sawanyawisutha, Somsak Tiamkaoa, Benjaporn Nitinavakarnb, Paron Dekumyoyc and Suthipun Jitpimolmarda

a Departments of Medicine, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
a Departments of Radiology, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
a Department of Helminthology, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand



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  		FIG 1. MR imaging of LS spine before treatment.

A, Midsagittal, noncontrast T1-weighted MR image reveals a long segmental hyperintense signal along the cauda equina at the lower lumbar region (arrows).

B, Axial, noncontrast T1-weighted MR image shows hyperintense signal at the same level of as that of A.

C, Midsagittal T2-weighted MR image shows hyperintense signal along cauda equina (arrow).

D, Axial noncontrast T2-weighted MR image reveals hyperintense signal of cauda equina at the same level as that of C (arrow).

E, Midsagittal postgadolinium injection T1-weighted with fat suppression MR image reveals a long segmental linear enhancement along the cauda equina at the lower lumbar region (white arrow). The conus medullaris is slightly enlarged with increase enhancement (black arrow).

F, Axial postgadolinium injection, T1-weighted MR image shows irregular hyperintense signal of cauda equina (at the level of white arrow in E).

G, Axial postgadolinium injection, T1-weighted MR image reveals irregular hyperintense signal of conus medullaris (at the level of black arrow in E).



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  		FIG 2. MR imaging of LS spine following treatment.

A, Sagittal T1-weighted MR image shows normal finding of cauda equina.

B, Sagittal T2-weighted MR image reveals clumping of the roots of cauda equina without a hyperintense signal.

C, Midsagittal postgadolinium T1-weighted image with fat suppression shows the enhancement of cauda equina.





Copyright © 2009 by the American Society of Neuroradiology. Print ISSN: 0195-6108 Online ISSN: 1936-959X