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The Journal of Bone and Joint Surgery, Vol 76, Issue 11 1643-1648, Copyright © 1994 by Journal of Bone and Joint Surgery, Inc

JOURNAL CONTENTS

Magnetic resonance imaging of entrapment of lumbar nerve roots in spondylolytic spondylolisthesis

JR Jinkins and A Rauch
Department of Radiology, University of Texas Health Science Center at San Antonio 78284-7800.

Conventional spin-echo T1-weighted parasagittal magnetic resonance images of fifteen consecutive patients who had spondylolytic spondylolisthesis were evaluated for evidence of impingement of a nerve root, which was indicated by the loss of perineural fat within the foramen. Seventeen of a possible thirty nerve roots appeared to be impinged on at the level of the spondylolisthesis. Thirteen of these seventeen nerve roots were associated with clinical evidence of radiculopathy on the side of the root with impingement. None of the thirteen nerve roots that did not appear to have impingement were associated with clinical evidence of radiculopathy. The association between the impingement of a nerve root as seen on magnetic resonance images and clinical symptoms was significant (p < 0.001). Impingement of the nerve root within the neural foramen appeared to be the cause of the radiculopathy in these patients who had spondylolytic spondylolisthesis, and magnetic resonance imaging was a good method for discrimination between nerve roots that were associated with a radiculopathy and those that were not.
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