Occipitoaxial spinal interarticular stabilization with vertebral artery preservation for atlantal lateral mass failure

J Neurosurg Spine. 2015 Feb;22(2):134-8. doi: 10.3171/2014.10.SPINE14131. Epub 2014 Nov 21.


The treatment of craniocervical instability caused by diverse conditions remains challenging. Different techniques have been described to stabilize the craniocervical junction. The authors present 2 cases in which tumoral destruction of the C-1 lateral mass caused craniocervical instability. A one-stage occipitoaxial spinal interarticular stabilization (OASIS) technique with titanium cages and posterior occipitocervical instrumentation was used to reconstruct the C-1 lateral mass and stabilize the craniocervical junction. The ipsilateral vertebral artery was preserved. The OASIS technique offers single-stage tumor resection, C-1 lateral mass reconstruction, and stabilization with a loadsharing construct. It could be an option in the treatment of select cases of C-1 lateral mass failure.

Keywords: C-1 lateral mass reconstruction; CVJ = craniovertebral junction; OASIS = occipitoaxial spinal interarticular stabilization; SINS = Spine Instability Neoplastic Score; VA = vertebral artery; craniocervical instability; technique; titanium cages; vertebral artery preservation.

Publication types

  • Case Reports

MeSH terms

  • Atlanto-Axial Joint / surgery*
  • Cervical Vertebrae / pathology
  • Cervical Vertebrae / surgery*
  • Female
  • Humans
  • Joint Instability / diagnosis
  • Joint Instability / surgery*
  • Male
  • Middle Aged
  • Spinal Fusion / methods
  • Surgery, Computer-Assisted*
  • Treatment Outcome
  • Vertebral Artery / surgery*