title: [MRI of the operated lumbar spine and enhancement of intradural nerve roots. 478 cases].
abstract: Authors report a study of 478 MR imaging in failed back surgery syndrome. Enhancing nerve roots were detected in 73.8%, with a significant higher percentage in male patients, and long postoperative delay. There was no significant correlation with age, enhancement of epidural scar (epidural scar was seen in 75.7%) and disk herniation (seen in 25.9%). Alteration of blood-nerve-barrier causes enhancement, but the mecanism is nuclear: mechanical, biological, immunological or Wallerian degeneration. Diagnostic and prognostic value of enhancement are not proven and a study of asymptomatic patients is necessary.
authors.affiliation: Service de Radiologie, HIA Val-de-Grâce, Paris.
authors.forename: G
authors.initials: G
authors.lastname: Cosnard
authors.forename: P
authors.initials: P
authors.lastname: Boulland
authors.forename: J L
authors.initials: JL
authors.lastname: Sarrazin
authors.forename: D
authors.initials: D
authors.lastname: Soulié
authors.forename: Y S
authors.initials: YS
authors.lastname: Cordoliani
mesh_terms: D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D007405:Intervertebral Disc Displacement / Q000601:surgery; D008159:Lumbar Vertebrae / Q000601:surgery*; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D010146:Pain / Q000209:etiology; D011183:Postoperative Complications; D012189:Retrospective Studies; D013126:Spinal Nerve Roots / Q000473:pathology*; D013997:Time Factors
vernacular_title: IRM du rachis lombaire opéré et rehaussement des racines intradurales. 478 cas.