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KMID : 1001920070420030184
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Journal of Korean Neurosurgical Society
2007 Volume.42 No. 3 p.184 ~ p.190
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Symptomatic Adjacent Segment Degeneration Following Posterior Lumbar Arthrodesis : Retrospective Analysis of 26 Patients Experienced in 10-year of Periods
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Shin Myung-Hoon
Ryu Kyeong-Sik
Kim Il-Sup
Park Chun-Kun
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Abstract
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Objective : The authors retrospectively analyzed clinical and radiographic features of patients who developed symptomatic adjacent segment degeneration (ASD) that required re-operation.
Methods : From 1995 to 2004, among 412 patients who underwent posterior lumbar fusion surgery, the authors experienced twenty-six patients who presented symptomatic ASD. Records of these patients were reviewed to collect clinical data at the first and second operations.
Results : The patients were 9 males and 17 females whose mean age was 63.5±8.7 years. Among 319 one segment and 102 multi-segment fusions, 16 and 10 patients presented ASD, respectively. Seventeen ASDs were noticed at the cephalad to fusion (65%), eight at the caudad (31%), and one at the cephalad and caudad, simultaneously (4%). All patients underwent decompression surgery. Nine patients underwent additional fusion surgeries to adjacent degenerated segments. In 17 patients who underwent only decompression surgery without fusion, the success rate was 82.4%. In fusion cases, the success rate was observed as 55.5%. There were no statistically significant factors to be related to development of ASD. However, in cases of multi-level fusion surgery, there was a tendency toward increasing ASD.
Conclusion : Multi-segment fusion surgery could be associated with a development of ASD. In surgical treatment of symptomatic ASD, selective decompression without fusion may need to be considered as a primary procedure, which could reduce the potential risk of later occurrence of the other adjacent segment disease.
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KEYWORD
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Degenerative lumbar disease, Lumbar fusion, Adjacent segment degeneration.
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