RT Journal Article SR Electronic T1 Posterior Epidural Migration of a Sequestrated Lumbar Disk Fragment: MR Imaging Findings JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP 1592 OP 1594 VO 27 IS 7 A1 C.Y. Chen A1 Y.L. Chuang A1 M.S. Yao A1 W.T. Chiu A1 C.L. Chen A1 W.P. Chan YR 2006 UL http://www.ajnr.org/content/27/7/1592.abstract AB 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.