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Position of Increased Signal Intensity in the Spinal Cord on MR Images: Does It Predict the Outcome of Cervical Spondylotic Myelopathy?
引用本文:沈洪兴,李凌,侯铁胜.Position of Increased Signal Intensity in the Spinal Cord on MR Images: Does It Predict the Outcome of Cervical Spondylotic Myelopathy?[J].中华医学杂志(英文版),2009,122(12):1418-1422.
作者姓名:沈洪兴  李凌  侯铁胜
作者单位:Department of Orthopaedics, Changhai Hospital, Second Military Medical University, Shanghai 200433, China 
摘    要:Background Increased signal intensity (ISI) in the spinal cord on T2-weighted MR images has been reported in some previous researches, however no study focused on the position of the ISI in the spinal cord and its potential value. The aim of this study was to investigate the correlation between ISI position and the outcome of surgical treatment for cervical spondylotic myelopathy (CSM) patients. Methods A retrospective study was conducted. Pre- and post-operative clinical status was evaluated by modified Japanese Orthopaedic Association (JOA) score. ISI was evaluated according to the T2-weighted sequences. The JOA score and the recovery ratios among patients with ISI in gray matter (group A), in both gray and white matter (group B), and ISI-negative group were compared. Results Totally 64 patients were enrolled in this retrospective study. Preoperative JOA score of ISI positive and negative group had significant difference, but the recovery ratios had no significant difference (the recovery ratios of the two groups in week 1, week 26, and week 104 were (21.54±14.65)%, (50.56±14.76)%, (59.23±13.08)% and (20.25±14.32)%, (54.46±3.16)% and (61.26±29.4)%, respectively; P 〉0.05). The recovery ratios of negative group and group A in week 104 were superior to group B (the recovery ratios of negative group, group A, and group B in week 104 were (61.26±29.49)%, (65.35±11.36)%, and (50.33±10.20)%, respectively; P 〈0.05). Conclusions Patients with ISI in the gray matter alone on T2-weighted MR images did not have significantly different surgical outcomes compared with those without ISI. Patients with ISI in both gray and white matter had surgical outcomes that were worse than those without ISI.

关 键 词:脊髓型颈椎病  信号强度  磁共振图像  T2加权序列  JOA评分  预测  MR图像  手术结果

Position of Increased Signal Intensity in the Spinal Cord on MR Images: Does It Predict the Outcome of Cervical Spondylotic Myelopathy?
SHEN Hong-xing,LI Ling,YANG Zhi-gao,HOU Tie-sheng.Position of Increased Signal Intensity in the Spinal Cord on MR Images: Does It Predict the Outcome of Cervical Spondylotic Myelopathy?[J].Chinese Medical Journal,2009,122(12):1418-1422.
Authors:SHEN Hong-xing  LI Ling  YANG Zhi-gao  HOU Tie-sheng
Abstract:Background Increased signal intensity (ISI) in the spinal cord on T2-weighted MR images has been reported in some previous researches, however no study focused on the position of the ISI in the spinal cord and its potential value. The aim of this study was to investigate the correlation between ISI position and the outcome of surgical treatment for cervical spondylotic myelopathy (CSM) patients.Methods A retrospective study was conducted. Pre- and post-operative clinical status was evaluated by modified Japanese Orthopaedic Association (JOA) score. ISI was evaluated according to the T2-weighted sequences. The JOA score and the recovery ratios among patients with ISI in gray matter (group A), in both gray and white matter (group B), and ISI-negative group were compared.Results Totally 64 patients were enrolled in this retrospective study. Preoperative JOA score of ISI positive and negative group had significant difference, but the recovery ratios had no significant difference (the recovery ratios of the two groups in week 1, week 26, and week 104 were (21.54±14.65)%, (50.56±14.76)%, (59.23±13.08)% and (20.25±14.32)%, (54.46±23.16)% and (61.26±29.4)%, respectively; P>0.05). The recovery ratios of negative group and group A in week 104 were superior to group B (the recovery ratios of negative group, group A, and group B in week 104 were (61.26±E29.49)%, (65.35±11.36)%, and (50.33±10.20)%, respectively; P <0.05). Conclusions Patients with ISI in the gray matter alone on T2-weighted MR images did not have significantly different surgical outcomes compared with those without ISI. Patients with ISI in both gray and white matter had surgical outcomes that were worse than those without ISI.
Keywords:cervical spondylotic myelopathy  increased signal intensity  Japanese Orthopaedic Association score  prognosis  recovery ratio
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