Letter to the Editor Surgical Technique: Hemilaminectomy and Unilateral Lateral Mass Fixation for Cervical Ossification of the Posterior Longitudinal Ligament
To the editor,
We read the article by Liu et al.  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
- Kato Y, Iwasaki M, Fuji T, Yonenobu K, Ochi T. Long term follow-up result of laminectomy for cervical myelopathy caused by ossification of posterior longitudinal ligament. J Neurosurg. 1988;89:217–223. CrossRef
- Liu K, Shi J, Jia L, Yuan W. Hemilaminectomy and unilateral lateral mass fixation for cervical ossification of the posterior longitudinal ligament. Clin Orthop Relat Res. 2013;471:2219–2224. CrossRef
- Winn HR. Youmans Neurological Surgery. 6th Edition of Vol. 3. Philadelphia, PA: Elsevier; 2011: 2708.
- Letter to the Editor Surgical Technique: Hemilaminectomy and Unilateral Lateral Mass Fixation for Cervical Ossification of the Posterior Longitudinal Ligament
Clinical Orthopaedics and Related Research®
Volume 471, Issue 12 , p 4093
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- 1. Department of Orthopaedics, Postgraduate Institute of Medical Education and Research, Dr. Ram Manohar Lohia Hospital, Baba Kharak Singh Marg, Connaught Place, New Delhi, DL, 110001, India
- 2. Bokaro General Hospital, Bokaro, India