Medknow Publications on behalf of the Neurological Society of India
Vol. 52, No. 2, 2004, pp. 215-219
Bioline Code: ni04066
Full paper language: English
Document type: Research Article
Document available free of charge
Neurology India, Vol. 52, No. 2, 2004, pp. 215-219
© Copyright 2004 Neurology India.
C3-4 level cervical spondylotic myelopathy|
Vyas KH, Banerji Deepu , Behari S, Jain S, Jain VK, Chhabra DK
Cervical spondylotic myelopathy (CSM) is uncommon at the C3-4 level. Fourteen patients with C3-4 CSM were treated over a period of 3 years. The radiological factors contributing to CSM at the C3-4 level were studied. These factors included the assessment of static and dynamic canal diameters, retrolisthesis, posterior osteophytes and degenerative spinal segmental fusion on plain X-rays; and, the antero-posterior cord compression ratio (APCR) on magnetic resonance imaging (MRI). The clinical status of the patients was assessed by the modified Japanese orthopedic association scale (mJOAS). The mean difference between the static and dynamic canal diameters was statistically significant at C3-4 (p < 0.01). The APCR obtained at different levels showed a significant compression at the C3-4 level in comparison to the lower level. There was a correlation between the APCR and the preop mJOAS, r=0.6 (p<0.05). The mean mJOAS improved from 9.35 to 14.35 at follo-up. The recovery rate calculated using the modified Hirabayashi rate was 66.9%. Degenerative changes at lower cervical segments predispose to increased mobility and spondylotic changes at the C3-4 level. The patients in this study were young as compared to those reported in the international literature.
Cervical spondylotic myelopathy, anterior approaches, static and dynamic canal diameter
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