ESCAPE : Evaluation of Spinal Conservation by Endoscopic Procedures to Avoid Fusion

Inclusion Criteria:

• Patient ≥ 18 years old

• Patient consulting for a medical reason involving a spinal pathology in theinvestigating center :

Syndrome adjacent to an old lumbar arthrodesis defined on preoperative radiographs by an antero-posterior translation > 3 mm, segmental kyphosis > 10° or a disc height reduced by more than 50%, or on preoperative MRI by central stenosis of grade C or D of the Schizas classification or a herniated disc Grade 1 or 2 degenerative spondylolisthesis, i.e. with slippage less than 50% of the depth of the underlying vertebral body.

Lumbar stenosis complicating lumbar scoliosis defined by a deformation with rotation of the vertebral bodies on a frontal radiograph (absence of centering of the spinous process between the two pedicles of the vertebra concerned) and a Cobb angle greater than 20° or a rotational dislocation .

• Indication for spinal surgery by endoscopy

Exclusion Criteria:

• Patient under guardianship or curatorship,

• Persons deprived of liberty by judicial or administrative decision,

• Persons undergoing psychiatric treatment under duress requiring the consent of thelegal representative

• Persons unable to express their consent,

• Persons under legal protection,

• Patient not affiliated to a social protection scheme.