The purpose of this study is to determine the safety profile and probable benefit of the Ellipse Technologies Inc. MAGEC System in subjects with early onset spinal deformity associated with thoracic insufficiency syndrome.

Inclusion Criteria:

• Early onset spinal deformity with any etiology
• Cobb angle measurement of 30 degrees or greater at the time of primary surgery
• Thoracic spine height (T1 to T12) less than 22 cm at the time of primary surgery
• Age less than 11 years old at the time of MAGEC implant
• Implanted with the MAGEC system as either a primary or secondary revision spinal bracing procedure
• Patient has been implanted for a minimum of 6 months
• Patient signs informed consent for the use of their personal private data

Exclusion Criteria:

• Patient declines to sign informed consent for the use of their personal private data.

All patients worldwide implanted with the Ellipse Technologies Spinal Bracing and Distraction System (Invitation to Volunteer Non-Probability Sample).