title: C7 intralaminar screw placement, an alternative to lateral mass or pedicle fixation for treatment of cervical spondylytic myelopathy, kyphotic deformity, and trauma: A case report and technical note.
abstract: BACKGROUND
  The authors present a case to illustrate the necessity and technical feasibility of C7 laminar screw placement for treatment of sub-axial cervical spondylitic myelopathy. The indications for C7 lateral mass screw placement was required internal fixation, with small lateral masses (8 mm) and pedicles (4 mm).
  
  
  METHODS
  A 67-year-old female with compressive myelopathy after a fall from standing is presented. Magnetic resonance (MR) imaging of the cervical spine showed severe C3-6 spondylosis with canal and foraminal compromise. Computed tomography of the cervical spine confirmed the MR imaging findings as well as showed suboptimal lateral mass and pedicles for screw placement. The patient underwent a C3-6 laminectomy, C3-6 lateral mass, and C7 laminar screw placement. Postoperatively, the patient recovered without complication.
  
  
  CONCLUSIONS
  Internal fixation of the cervical spine after iatrogenic destabilization by decompression of neural elements secondary to advanced spondylosis can be technically challenging. Anatomical landmarks needed for safe placement of lateral mass or pedicle instrumentation are often distorted by the patients' advanced pathology or Inherent biology. The C7 screw is a key structural element to a long construct and therefore necessitates large lateral masses or pedicles to safely place a functional screw. C7 laminar screws may be placed safely without fluoroscopic guidance when sufficient C7 lateral mass or pedicle screws are not possible or with undue risk.
authors.affiliation: Department of Neurosurgery, Dean Clinic, Madison, Wisconsin, USA.
authors.forename: Michael T
authors.initials: MT
authors.lastname: Koltz
authors.affiliation: Department of Neurosurgery, Thomas Jefferson University, Philadelphia, PA, USA.
authors.forename: Christopher M
authors.initials: CM
authors.lastname: Maulucci
authors.affiliation: Department of Neurosurgery, University of Maryland School of Medicine, Baltimore, Maryland, USA.
authors.forename: Charles A
authors.initials: CA
authors.lastname: Sansur
authors.affiliation: Department of Neurosurgery, Oregon Health Science University, Portland Oregon, USA.
authors.forename: D Kojo
authors.initials: DK
authors.lastname: Hamilton
keywords: Intralaminar fixation; myleopathy; stenosis; sub-axial cervical spine; trauma