title: [Lumbar intraspinal synovial cysts: imaging and treatment by percutaneous injection. Report of thirteen cases].
abstract: OBJECTIVE
  The CT and MR imaging findings in 13patients with lumbar intra spinal synovial cysts were retrospectively analysed and the results of facet corticosteroid injection were evaluated.
  
  
  METHODS
  Over a 7 year period, 13patients with radicular pain were identified as having lumbar intra spinal synovial cysts. They ranged from 42 to 87 years of age. All patients were evaluated by CT without contrast material and underwent facet arthrography associated with corticosteroid injection and CT arthrography. MR imaging was performed in all patients either before or after percutaneous treatment. CT scans and MR images were reviewed and patient outcome was evaluated at 1and 6month followup.
  
  
  RESULTS
  CT scan revealed a cystic structure adjacent to a degenerated facet joint in 9 patients (69% sensitivity). MRI showed more accurately the cyst on T2 weighted and/or axial images. Complete or good relief of radicular pain and functional restrictions were achieved in 9 patients (69%) at 1 month follow up, still to be found in 6patients (46%) at 6months.
  
  
  CONCLUSIONS
  In patients with radiculopathy and facet degenerative changes, intra spinal synovial cysts must be looked for. Facet corticosteroid injection is a useful alternative to surgical removal.
authors.affiliation: Service d'Imagerie.
authors.forename: P
authors.initials: P
authors.lastname: Sauvage
authors.forename: L
authors.initials: L
authors.lastname: Grimault
authors.forename: D
authors.initials: D
authors.lastname: Ben Salem
authors.forename: I
authors.initials: I
authors.lastname: Roussin
authors.forename: M
authors.initials: M
authors.lastname: Huguenin
authors.forename: M
authors.initials: M
authors.lastname: Falconnet
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001175:Arthrography; D005260:Female; D005500:Follow-Up Studies; D005938:Glucocorticoids / Q000008:administration & dosage / Q000627:therapeutic use*; D006801:Humans; D007278:Injections, Spinal; D008159:Lumbar Vertebrae / Q000000981:diagnostic imaging / Q000473:pathology*; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D009437:Neuralgia / Q000175:diagnosis / Q000188:drug therapy; D017060:Patient Satisfaction; D012008:Recurrence; D012189:Retrospective Studies; D012680:Sensitivity and Specificity; D013122:Spinal Diseases / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000188:drug therapy; D013126:Spinal Nerve Roots / Q000473:pathology; D013581:Synovial Cyst / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000188:drug therapy; D014057:Tomography, X-Ray Computed; D016896:Treatment Outcome; D014221:Triamcinolone / Q000008:administration & dosage / Q000627:therapeutic use*
chemical_list: D005938:Glucocorticoids; D014221:Triamcinolone