Active discopathies or MODIC 1, are a diagnostic entity discovery with the contribution of MRI in which the first cases were described by Dr. Michael MODIC in 1988. It is characterized by a vertebral bone edema secondary to active discarthrose. Its prevalence is estimated at 6% of the general population and up to 40% of the CLBP according to studies. Following the discovery of this recent diagnostic entity, responsible for low back pain, the question of its management is debate in the medical community. Early studies demonstrate the effectiveness of corticosteroid injections in intra-disc. Other works, most recent, suggest the contrary, infectious, incriminating a pathogenic role of certain bacteria such as Propionibacterium acness or Corynebacterium propinquum recommending, in contrast, treatment with prolonged antibiotic therapy. This study will aim to assess the effectiveness of intra-disc infiltration GHPSJ carried out between 2007 and 2014. The innovation of our work will be to assess these infiltrations in various subgroups such as patients with a previous surgery of the spine or a history of scoliosis or spondylolisthesis.