A case of adult a-type spinal deformity with spinal cord rotation greater than 90°

Sean N. Neifert, Lauren K. Grant, Jonathan J. Rasouli, Ian Thomas McNeill, Samuel K. Cho, John M. Caridi

Research output: Contribution to journalArticlepeer-review


This report describes a 42-year-old man who presented with an a-type spinal deformity with a Cobb angle of 224.9° and associated spinal cord rotation greater than 90°. Preoperative imaging revealed extensive spinal deformity, and 3D modeling confirmed the a-type nature of his deformity. Intraoperative photography demonstrated spinal cord rotation greater than 90°, which likely contributed to the patient's poor neurological status. Reports of patients with Cobb angles ≥ 100° are rare, and to the authors' knowledge, there have been no published cases of adult a-type spinal deformity. Furthermore, very few cases or case series of spinal cord rotation have been published previously, with no single patient having rotation greater than 90° to the authors' knowledge. Given these two rarities presenting in the same patient, this report can provide important insights into the operative management of this difficult form of spinal deformity.

Original languageEnglish
Pages (from-to)502-506
Number of pages5
JournalJournal of Neurosurgery: Spine
Issue number4
StatePublished - Oct 2020
Externally publishedYes


  • A-type spinal deformity
  • Myelopathy
  • Spinal cord rotation
  • Twisted spinal cord


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