OBJECTIVE:
 To  study  the  results  of  facet  joint 
 intraarticular  steroid  injections  in  a 
 patient  with  symptomatic  lumbar  facet 
 joint  synovial  cysts  developped  in  intra 
 ductal.
                 INTRODUCTION
   
    Facet  joint  synovial  cyst  is  an  Expansion  of  the  joint  capsule  and 
   synovium into the spinal canal
   
    By definition it communicates with the adjacent joint
   
    The average age when it occured is 60 years 
   
    It‘s a rare cause of radicular pain
   
    Clinical signs are unilateral nerve root or radicular claudication bilateral 
   lower 
   
    Is easily diagnosed by new medical imaging modalities
   
    Image-guided percutaneous steroid injections presents often an effective 
   alternative to surgery
           CASE REPORT
  The patient is a 59-years woman
  Without  individual  medical  history  outside  of  an 
  overweight 
  complaining  of  low  back  sciatica  type  left  L5, 
  associated  with  a  left  cruralgia,    refractory  to 
  medical treatment 
  EXPLORATION BY IMAGING
   Radiographs of the lumbosacral spine : a degenerative spinal disco, 
   more advanced at L4-L5 segment, associated with a degenerative Low-
   grade isthmic spondylolisthesis.
   The CT scan : an intra ductal synovial cyst, next to the left posterior 
   facet joint L4-L5, measuring 2cm long axis, which causes a conflict 
   with the L5 root at its emergence, and L4 ipsilateral root. 
    THERAPEUTIC MANAGEMENT
  A well conducted medical treatment with rest did 
  not lead to a favorable outcome.
    A  surgical  treatment  proposed  refused  by  the 
  patient
  She  was  entrusted  to  us  for  a  percutaneous 
  treatment