The parameters of the sagittal balance of the cervical, thoracic and lumbar spine vary according to the types of spino-pelvic organization (types 1-4 according to Roussouly). These parameters have been described as a function of age in previous scientific work without taking into account the pelvic anatomy (pelvic incidence and spino-pelvic organization). This work, carried out within the framework of a round table of the French Society of Spinal Surgery (SFCR), would make it possible to provide a more detailed repository of existing radiographic parameters.

Inclusion criteria:

• Minor or major subject aged 5 to 100
• Subject having carried out a telecolonne or EOS type X-ray for spinal balance (low back pain, sciatica, cervico-brachial neuralgia, inequality of length of the lower limbs) in spinal surgery consultation
• Subject not having expressed its opposition, after information, to the re-use of its data for the purposes of this research.

Exclusion criteria:

• Subject with surgical history, fractures, osteoporotic packing, vertebral deformation (scoliosis, kyphosis, spondylolisthesis grades 2-5), vertebral osteolysis (spondylodiscitis, tumor or metastasis).
• Subject who expressed his opposition to participate in the study
• Subject under guardianship or curatorship
• Subject under judicial protection

Subject having carried out a telecolonne or EOS type X-ray for spinal balance (low back pain, sciatica, cervico-brachial neuralgia, inequality of length of the lower limbs) in spinal surgery consultation