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AJNR - American Journal of Neuroradiology

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American Journal of Neuroradiology 27:1592-1594, August 2006
© 2006 American Society of Neuroradiology

Case Report
SPINE

Posterior Epidural Migration of a Sequestrated Lumbar Disk Fragment: MR Imaging Findings

C.Y. Chen^a,c, Y.L. Chuang^a, M.S. Yao^c, W.T. Chiu^d, C.L. Chen^b and W.P. Chan^a,c

^a Department of Radiology, School of Medicine, Taipei Medical University
^b Department Pathology, School of Medicine, Taipei Medical University
^c Department of Radiology, Taipei Medical University-Municipal Wan Fang Hospital
^d Department Neurosurgery, Taipei Medical University-Municipal Wan Fang Hospital

Please address correspondence to: Wing P. Chan, MD, Department of Radiology, Taipei Medical University-Municipal Wan Fang Hospital, 111 Hsing Long Rd, Section 3, Taipei 116, Taiwan, Republic of China; e-mail: wingchan{at}tmu.edu.tw

SUMMARY: We present a 75-year-old man who, for 2 weeks, had progressive pain in both of his thighs when standing straight. MR imaging showed a sequestrated disk fragment, which had a signal intensity similar to that of a herniated disk with a rim enhancement in the posterior epidural space and a ruptured outermost annulus of the intervertebral disk at L2–3. Awareness of these MR imaging findings can help in the diagnosis of posterior epidural disk migration.