title: Posterior epidural migration of a sequestrated lumbar disk fragment: MR imaging findings.
abstract: 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.
authors.affiliation: Department of Radiology, School of Medicine, Taipei Medical University, Taipei 116, Taiwan.
authors.forename: C Y
authors.initials: CY
authors.lastname: Chen
authors.forename: Y L
authors.initials: YL
authors.lastname: Chuang
authors.forename: M S
authors.initials: MS
authors.lastname: Yao
authors.forename: W T
authors.initials: WT
authors.lastname: Chiu
authors.forename: C L
authors.initials: CL
authors.lastname: Chen
authors.forename: W P
authors.initials: WP
authors.lastname: Chan
mesh_terms: D000368:Aged; D004824:Epidural Space; D005548:Foreign-Body Migration / Q000175:diagnosis / Q000209:etiology*; D006801:Humans; D007403:Intervertebral Disc / Q000473:pathology*; D007405:Intervertebral Disc Displacement / Q000150:complications* / Q000175:diagnosis; D008159:Lumbar Vertebrae / Q000473:pathology*; D008279:Magnetic Resonance Imaging; D008297:Male; D009408:Nerve Compression Syndromes / Q000209:etiology; D010146:Pain / Q000209:etiology; D012422:Rupture, Spontaneous; D013126:Spinal Nerve Roots / Q000473:pathology; D013848:Thigh / Q000294:innervation