• Patient age 8-21 years

• Diagnosis of Cerebral Palsy (standard definition of any brain injury before the age of 3) with total body involvement - any functional level

• Coronal Curve \>50 degrees on sitting film (as measured by 'greatest Cobb') OR Kyphotic curve \>70 degrees on sitting film (as measured by T5-T12) AND

• A spinal fusion is being undertaken and the patient/family is proceeding with the spinal fusion (with any level of distal fusion).

⁃ OR

⁃ • A spinal fusion is not being undertaken (Non-Operative cohort) either because the family has refused surgery or because it is not recommended at this point or surgery is recommended but is not being undertaken because they are on a waiting list, and are being enrolled as a non-op patient because they will be on the waiting list for \>18 months.