The Journal of Bone and Joint Surgery (American). 2005;87:610-615.
doi:10.2106/JBJS.C.01711
© 2005 The Journal of Bone and Joint Surgery, Inc.
Ossification of the Posterior Longitudinal Ligament
Results of Anterior Cervical Decompression and Arthrodesis in Sixty-one North American Patients
Theodore A. Belanger, MD1,
Jeffrey S. Roh, MD2,
Stephen E. Hanks, MD3,
James D. Kang, MD4,
Sanford E. Emery, MD, MBA5 and
Henry H. Bohlman, MD2
1 Miller Orthopaedic Clinic, 1001 Blythe Boulevard, Suite 200, Charlotte, NC
28203. E-mail address:
ted.belanger{at}millerclinic.com
2 University Hospitals Spine Institute and the Department of Orthopaedic
Surgery, Case Western Reserve University School of Medicine, 11100 Euclid
Avenue, Cleveland, OH 44106.
3 University of Arizona Health Sciences Center, P.O. Box 245064, Tucson, AZ
85719. E-mail address:
sehanks{at}email.arizona.edu
4 University of Pittsburgh Medical Center, 3471 Fifth Avenue, Suite 1010,
Pittsburgh, PA 15213. E-mail address:
kangjd{at}upmc.edu
5 Robert C. Byrd Health Sciences Center, Box 9196, Morgantown, WV 26506. E-mail
address:
semery{at}hsc.wvu.edu
Investigation performed at University Hospital Spine Institute, Case
Western Reserve University, Cleveland, Ohio
In support of their research or preparation of this manuscript, one or more
of the authors received grants or outside funding from Medtronic Sofamor
Danek. None of the authors received payments or other benefits or a commitment
or agreement to provide such benefits from a commercial entity. No commercial
entity paid or directed, or agreed to pay or direct, any benefits to any
research fund, foundation, educational institution, or other charitable or
nonprofit organization with which the authors are affiliated or
associated.
Background: Ossification of the posterior longitudinal ligament is
commonly associated with cervical myelopathy. Surgical treatment is a matter
of controversy. We report on a series of patients who were managed with
anterior cervical decompression and arthrodesis for the treatment of cervical
myelopathy associated with ossification of the posterior longitudinal
ligament.
Methods: We retrospectively reviewed the records for all sixty-five
patients who had been managed with anterior decompression and arthrodesis for
the treatment of cervical ossification of the posterior longitudinal ligament
and associated neurologic compression from 1982 to 2001. Sixty-one patients
(thirty-nine men and twenty-two women) were followed for at least two years
(or until the time of death). The average number of vertebrae resected was
2.2. The average duration of follow-up for the sixty surviving patients was
four years (range, two years to fifteen years and four months). The
preoperative, six-week postoperative, and final follow-up clinical status
(including neurological function as assessed with the Nurick grading system)
was recorded for each patient.
Results: Fifty-six of the sixty-one patients had neurological
improvement, with an average improvement of 1.5 Nurick grades at the time of
the final follow-up. Eight patients had absent dura at the time of surgery
and, of these, five had development of a cerebrospinal fluid fistula. Eight
patients had development of new neurological signs and/or symptoms in the
upper extremity postoperatively. Eight patients required reoperation because
of a painful pseudarthrosis (one patient), strut-graft dislodgment (three),
cerebrospinal fluid leakage (three), or compression of a nerve root caudad to
the area of the original procedure (one). One patient died as the result of
cardiac arrest on the third postoperative day. Fifty-eight patients had an
osseous fusion, one had an asymptomatic nonunion, and one had a symptomatic
pseudarthrosis that was treated with revision surgery.
Conclusions: Anterior decompression and arthrodesis is an effective
way to achieve pain relief and neurological improvement in North American
patients of non-Asian descent who have cervical myelopathy associated with
ossification of the posterior longitudinal ligament. The risk of durocutaneous
fistula, graft dislodgment, and postoperative neurological symptoms appears to
be high in patients with cervical myelopathy associated with this
condition.
Level of Evidence: Therapeutic Level IV. See Instructions
to Authors for a complete description of levels of evidence.

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