Management of Paraspinal Muscular Spasm with Resulting Scoliosis
The primary management priority is to identify and treat the underlying cause of the paraspinal muscle spasm, as the scoliosis is secondary and will often resolve once the spasm is addressed.
Critical First Step: Rule Out Structural Pathology
The most important initial action is obtaining upright PA and lateral spine radiographs to distinguish between true structural scoliosis and functional scoliosis from muscle spasm 1. This is non-negotiable because:
- Osteoid osteoma of the posterior vertebral elements is a well-known cause of painful paraspinal spasm leading to secondary scoliosis 1, 2
- Vertebral infections (including tuberculosis) can present similarly 1
- Other bony lesions require identification before treatment
Red Flags Requiring MRI
If any of the following are present, obtain complete spine MRI before proceeding 1:
- Functionally disruptive pain (not just mild discomfort)
- Focal neurologic findings on examination
- Left thoracic curve pattern
- Rapid curve progression (>1° per month)
- Absence of normal apical lordosis (hyperkyphosis instead)
- Cutaneous stigmata suggesting spinal dysraphism (hemangiomas, hairy patches, nevi, dermal sinus tracts) 1
Treatment Algorithm for Muscle Spasm-Induced Scoliosis
When Imaging Shows No Structural Lesion:
Immediate pharmacologic management:
- Muscle relaxants combined with NSAIDs should be started early and aggressively 3
- This combination directly addresses both the spasm and inflammatory component
- Early administration prevents progression to chronicity 3
Physical therapy approach:
- Early patient mobilization is essential—bed rest worsens outcomes 3
- Focus on reducing paraspinal muscle asymmetry through targeted exercises
- Asymmetric exercises are more effective than symmetric ones for activating paraspinal muscles 4
When Imaging Identifies a Lesion (e.g., Osteoid Osteoma):
Definitive treatment is required 2:
- Radiofrequency ablation OR open excision with curettage
- Once the lesion is removed, the paraspinal spasm resolves and the scoliosis corrects spontaneously 2
- Prolonged analgesic use without addressing the source is inappropriate due to medication side effects 2
Key Clinical Pearls
The Spasm-Scoliosis Relationship
The scoliosis in this scenario is functional, not structural. When paraspinal muscle spasm resolves, the curve corrects 2. This distinguishes it from idiopathic or congenital scoliosis where the deformity is fixed.
Timing Matters
- Do not delay imaging if pain persists beyond initial conservative treatment
- Patients are often treated with analgesics alone for prolonged periods before appropriate workup 2
- The deformity may become the primary concern, but the underlying cause must be addressed
Avoid These Pitfalls
Don't assume all scoliosis with pain is idiopathic—muscle spasm causing scoliosis suggests an underlying irritative lesion 1, 2
Don't rely on normal neurologic exam to exclude pathology—studies show 62% accuracy for detecting intraspinal anomalies by exam alone in structural scoliosis 1
Don't order bone scan as initial imaging—it provides no intraspinal information and radiographs are the appropriate first test 1
Don't treat with chronic opioids—the evidence supports muscle relaxants + NSAIDs, early mobilization, and addressing the underlying cause 3
Monitoring and Follow-up
Once treatment is initiated:
- Reassess clinically within 2-4 weeks to confirm spasm reduction
- Repeat radiographs only if there's objective clinical change in the deformity 1
- If the curve doesn't improve with spasm resolution, reconsider whether this is truly functional scoliosis or an undiagnosed structural problem
The bottom line: Paraspinal muscle spasm causing scoliosis is a symptom, not a diagnosis. Aggressive workup to find the cause, combined with early muscle relaxants and NSAIDs, will resolve both the spasm and the secondary curve in most cases.