, Volume 471, Issue 12, p 4093

Letter to the Editor Surgical Technique: Hemilaminectomy and Unilateral Lateral Mass Fixation for Cervical Ossification of the Posterior Longitudinal Ligament

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To the editor,

We read the article by Liu et al. [2] with great interest.

Liu and colleagues studied a new surgical technique for multilevel continuous/mixed cervical ossification of posterior longitudinal ligament (OPLL) without fixed kyphosis by multilevel hemilaminectomy with unilateral lateral mass fixation with good results. However, we have some concerns.

As described by the authors, there are various options for cervical OPLL depending on its type, associated deformity, and number of vertebrae involved. A posterior approach is based on the concept of indirect decompression by increasing space available for the spinal cord through laminectomy or various type of laminoplasty without directly addressing the ossified lesion. Liu and colleagues stated that the occupying rates were a significant factor for poor results. Occupying rate is defined as the thickness of OPLL divided by the AP diameter of bony spinal canal on the axial CT image. Hemilaminectomy alone will not decompress enough

(RE: Liu K, Shi J, Jia L, Yuan W. Surgical Technique: Hemilaminectomy and Unilateral Lateral Mass Fixation for Cervical Ossification of the Posterior Longitudinal Ligament. Clin Orthop Relat Res. 2013;471:2219–2224.)
The authors certify that they, or any members of their immediate families, have no funding or commercial associations (eg, consultancies, stock ownership, equity interest, patent/licensing arrangements, etc) that might pose a conflict of interest in connection with the submitted article.
All ICMJE Conflict of Interest Forms for authors and Clinical Orthopaedics and Related Research ® editors and board members are on file with the publication and can be viewed on request.
The opinions expressed are those of the writers, and do not reflect the opinion or policy of CORR ® or the Association of Bone and Joint Surgeons®.
A comment to this article is available at http://dx.doi.org/10.1007/s11999-013-3318-7.
This comment refers to the article available at: http://dx.doi.org/10.1007/s11999-013-2889-7.