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Post-laminectomy kyphosis in patients with cervical ossification of the posterior longitudinal ligament : does it cause neurological deterioration?
MedLine Citation:
PMID:  19096629     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Abstract/OtherAbstract:
OBJECTIVE: Total laminectomy (TL) is an effective surgical technique for the treatment of cervical ossification of the posterior longitudinal ligament (OPLL) along multiple levels. However, kyphosis and probable neurological deterioration have been frequently reported after laminectomy. We analyzed the changes in the cervical curvature after TL and subsequent changes in neurological status.
METHODS: We retrospectively reviewed the records of 14 patients who underwent TL for the treatment of cervical OPLL between Jan. 1998 and Dec. 2003. TL was selected according to the previously determined criteria. The curvature of the cervical spine was visualized on a lateral cervical spine X-ray and measured using Ishihara's Curvature Index (CI) before the operation and at the last follow-up examination. Perioperative neurological status was estimated using the modified Japanese Orthopedic Association score and the Improvement Rate (IR) at the same time as the images were evaluated.
RESULTS: The mean age of the patients was 57 years, the male/female ratio was 10:4, and the mean follow-up period was 41 months. The mean number of OPLL was 4.9, and the mean number of operated levels was also 4.9. The CI decreased after TL (p=0.002), which was indicative of a kyphotic change. However, this kyphotic change showed no correlation with the length of the follow-up period, number of operated levels and preoperative CI. Neurological examination at the last follow-up showed an improved neurological status in all patients (p=0.001). There was no neurological deterioration in any case during the follow-up period. Moreover, there was no correlation between IR and the degree of kyphotic change. Postoperative complications, such as C5 radiculopathy and epidural bleeding, resolved spontaneously without neurological sequelae.
CONCLUSION: Kyphotic change was observed in all but one patient who underwent TL for the treatment of cervical OPLL. However, we did not find any contributing factors to kyphosis or evidence of postoperative neurological deterioration.
Authors:
Won-Sang Cho; Chun Kee Chung; Tae-Ahn Jahng; Hyun Jib Kim
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Publication Detail:
Type:  Journal Article     Date:  2008-06-20
Journal Detail:
Title:  Journal of Korean Neurosurgical Society     Volume:  43     ISSN:  2005-3711     ISO Abbreviation:  J Korean Neurosurg Soc     Publication Date:  2008 Jun 
Date Detail:
Created Date:  2008-12-19     Completed Date:  2011-07-14     Revised Date:  2013-05-23    
Medline Journal Info:
Nlm Unique ID:  101467054     Medline TA:  J Korean Neurosurg Soc     Country:  Korea (South)    
Other Details:
Languages:  eng     Pagination:  259-64     Citation Subset:  -    
Affiliation:
Department of Neurosurgery , Seoul National University, College of Medicine, Seoul, Korea.
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