Sagittal plane deformities in children with sma2 following posterior spinal instrumentation

Matthew A. Halanski, Rewais Hanna, James Bernatz, Max Twedt, Sarah Sund, Karen Patterson, Kenneth J. Noonan, Meredith Schultz, Mary K. Schroth, Mark Sharafinski, Brian P. Hasley

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

This is a retrospective radiographic review to assess post-operative sagittal plane deformities in patients with Spinal Muscular Atrophy type 2 that had been treated with posterior spinal instrumentation. Thirty-two patients with a history of either spinal fusion (N = 20) or growing rods (N = 12) were identified with an average of 7.6 (2.1–16.6) years post-operative follow-up. Forty percent (13/32) of the patients were identified as having obvious “tucked chin” (N = 4), “tipped trunk” (N = 9), or both (N = 3). Sacral incidence was the only parameter that was statistically significant change between pre-operative or immediate post-operative measurements (66.9 vs. 55.2 p = 0.03). However, at final follow-up, the post-operative thoracic kyphosis had decreased over time in those that developed a subsequent sagittal deformity (24.2 ) whereas it increased in those that did not (44.7, p = 0.008). This decrease in thoracic kyphosis throughout the instrumented levels, resulted in a greater lordotic imbalance (30.4 vs. 5.6, p = 0.001) throughout the instrumented levels in the group that developed the subsequent cervical or pelvic sagittal deformities. In conclusion, sagittal plane deformities commonly develop outside the instrumented levels in children with SMA type 2 following posterior spinal instrumentation and may be the result of lordotic imbalance that occurs through continued anterior growth following posterior instrumentation.

Original languageEnglish (US)
Article number703
JournalChildren
Volume8
Issue number8
DOIs
StatePublished - Aug 2021

Keywords

  • Kyphosis
  • Posterior spinal fusion
  • Sagittal plane deformity
  • Spinal muscular atrophy

ASJC Scopus subject areas

  • Pediatrics, Perinatology, and Child Health

Fingerprint

Dive into the research topics of 'Sagittal plane deformities in children with sma2 following posterior spinal instrumentation'. Together they form a unique fingerprint.

Cite this