Congenital Scoliosis

Modern Study Review (AI-Generated)

High-Yield Summary

Congenital scoliosis results from vertebral malformations due to failure of formation, segmentation, or both during embryonic development. It often presents early in life with progressive spinal deformity and may be associated with intraspinal and extra-skeletal anomalies. Early recognition and intervention are critical to prevent severe deformity and preserve function. Treatment strategies balance bracing attempts with timely surgical correction, tailored to the type and severity of vertebral anomalies.

Key Diagnostic Findings

Anatomy

• Failure of formation: Hemivertebrae (fully, partially, or incarcerated)
• Failure of segmentation: Unilateral or bilateral unsegmented bars
• Most patients have a combination of both defects.
• Commonly associated with other congenital anomalies (renal, cardiac, intraspinal).

Clinical Presentation

• Visible spinal deformity in infancy or early childhood.
• Progressive scoliosis often detected during growth spurts.
• Possible neurologic symptoms if intraspinal anomalies coexist.

Imaging

• X-rays: Identify type and extent of vertebral anomalies; assess curve magnitude and progression.
• MRI: Mandatory to evaluate for intraspinal anomalies (e.g., tethered cord, syrinx).
• CT scan: Useful for detailed bony anatomy, especially preoperative planning.

Classification Systems

– Note: Greater segmentation correlates with worse prognosis due to continued asymmetric growth potential.

Current Gold Standard Treatment

Non-operative

• Bracing has limited efficacy compared to adolescent idiopathic scoliosis.
• May be attempted in mild, non-progressive curves or as a temporizing measure.
• Close monitoring is essential to detect progression early.

Operative

• Indications: Progressive deformity, significant curve magnitude, or neurologic compromise.
• Techniques:
• Posterior spinal fusion is the mainstay and often sufficient.
• Hemivertebra excision may be performed for isolated hemivertebrae causing deformity.
• Anterior fusion is less commonly required due to abnormal anterior growth plates but should be considered in very young patients to prevent crankshaft phenomenon.
• Early surgical intervention is favored to prevent severe deformity and improve long-term outcomes.

Modern Complications & Outcomes

Complications

Outcomes

• Early surgical correction improves pain, function, and cosmetic appearance.
• Long-term follow-up shows stable correction with modern fusion techniques.
• Untreated or delayed treatment leads to severe deformity, cardiopulmonary compromise, and functional impairment.
• Multidisciplinary care (orthopaedics, neurology, genetics) optimizes outcomes.

Classic Clinical Notes

Congenital Scoliosis

Approach to Congenital Scoliosis

• Failure of segmentation or formation, or both – patients with this often have BOTH.
• Look for other intraspinal and extra-skeletal abnormalities.

From worst to best:

• Unilateral unsegmented bar with contralateral hemivertebrae
• Unilateral unsegmented bar
• Fully segmented hemivertebrae
• Partially segmented hemivertebrae
• Incarcerated hemivertebrae
• Unsegmented hemivertebrae

• Note that the more segmentation of the hemivertebrae, the worse its prognosis.
• Bracing should be tried but is far less successful than in adolescent idiopathics.
• Should not wait too long before pulling the trigger on these – don’t allow them to develop a huge deformity before conceding and trying to do something.

Surgery

• Usually posterior fusion suffices – anterior crankshaft is not as big of a problem in this population because their anterior growth plates are usually not normal. But you should think of doing anterior fusion also in the very young.
• Consider hemivertebrae excision (usually, a hemivertebrae can be managed with posterior fusion alone).

Last Updated on January 25, 2026 by orthonet