The purpose of this study to determine the radiographic and clinical outcomes of spinal deformity surgical treatment in patients with Scheuermann's Kyphosis.

Inclusion Criteria:

• Patient age < 21 years
• Male or female
• Diagnosis of classical Scheuermann's Kyphosis (3 successive vertebrae wedged 5 degrees or more, +/- end plate deformities) or idiopathic structural Kyphosis (rigid structural kyphosis without classic Scheuermann's Kyphosis findings).
• for which surgical treatment is recommended to prevent progression of the curvature or to correct trunk deformity (unacceptable cosmesis) - any deformity magnitude.

OR

• for which surgical treatment is not being undertaken (and alternate treatment, i.e. bracing, or observation) is being pursued for any curve magnitude of clinical concerns of Scheuermann's Kyphosis.
• Inclusion Criteria for Anterior Release (for those surgeons performing anterior release surgery): Deformity magnitude = any degree and any other criteria defined by the individual surgeon.
• Posterior disc herniation is not an exclusion criteria from being in the study, only from being in the Posterior surgery group - these patients will be defaulted to Ant/Post Surgery.
• Only patients that have had a pre-op MRI performed as a part of their routine care, should be included in this study.

Exclusion Criteria:

• Previous operated Kyphosis, Scoliosis or Spondylolisthesis
• Neuromuscular co-morbidity
• Post laminectomy kyphosis

Patients who present to the investigator's clinic, who meet the inclusion criteria will be offered enrollment in the study.