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下颈椎多节段病变伴神经根或脊髓病行单节段或双节段颈椎前路椎体次全切除术后颈椎矢状位影像学随访:一项回顾性研究。

Long-term follow-up of cervical radiographic sagittal spinal alignment after 1- and 2-level cervical corpectomy for the treatment of spondylosis of the subaxial cervical spine causing radiculomyelopathy or myelopathy: a retrospective study.

机构信息

Department of Neurosurgery, University of Cincinnati College of Medicine, Cincinnati, Ohio 45267-0515, USA.

出版信息

J Neurosurg Spine. 2012 Jan;16(1):2-7. doi: 10.3171/2011.9.SPINE10430. Epub 2011 Oct 28.


DOI:10.3171/2011.9.SPINE10430
PMID:22035103
Abstract

OBJECT: Few data exist regarding long-term outcomes after cervical corpectomy for spondylotic cervical myelopathy and radiculomyelopathy. In this retrospective review, long-term radiographic outcomes are reported for 130 patients after 1- or 2-level cervical corpectomy for spondylotic myelopathy or radiculomyelopathy. METHODS: Electronic medical records including clinical data and radiographic images during a 15-year period (1993-2008) were reviewed at the Cincinnati Department of Veterans Affairs Medical Center. All patients underwent radiographic follow-up for at least 12 months (range 12-156, mean 45 ± 39.3 months), as well as clinical follow-up performed by neurosurgery staff for a mean of 29.3 ± 39.6 months (range 4-156 months). Clinical parameters at surgery and last examination included the Chiles modified Japanese Orthopaedic Association (mJOA) Myelopathy Scale. Measurements included cervical spine sagittal alignment on lateral radiographs preoperatively and postoperatively, focal Cobb angles at operated levels, and C2-7 regional alignment. Statistical analysis included the Student t-test and chi-square test. Perioperative complications and additional surgery in the cervical spine were recorded. RESULTS: The mJOA scores improved from a mean of 11.91 ± 2.4 preoperatively to 14.9 ± 2.33 postoperatively. The mean sagittal lordosis of the C2-7 spine increased from -16.2° ± 9.2° preoperatively to -18.5° ± 11.9° at last follow-up. Focal Cobb angles averaged a slight kyphotic angulation of 4.1° ± 2.3° at latest radiographic follow-up; of note, 7 patients (5.4%), all who had cylindrical titanium mesh cages (CTMCs), showed severe kyphotic angulation (+8.4° ± 2.4°). Patients with preoperative myelopathy showed clinical improvement at follow-up. The fusion rate was 96.2%; 3 of the 5 patients with radiographic evidence of nonfusion were smokers. Patients with postoperative kyphosis had significantly more chronic neck pain (visual analog scale score >4 lasting more than 6 months) and visits related to pain (p <0.01). Those with CTMCs had higher rates of postoperative kyphosis, chronic neck pain, and visits related to pain, irrespective of the number of levels fused (p <001). At latest follow-up, although a kyphotic increase occurred in the focal cervical sagittal Cobb angles, lordosis increased in C2-7 sagittal Gore angles. Two patients (1.5%) underwent revision of the implanted graft and/or hardware, and 5 patients (3.8%) had another procedure for adjacent-level pathologies 1-9 years later (mean 4.4 ± 2.7 years). CONCLUSIONS: Long-term follow-up data in our veteran population support cervical corpectomy as an effective, long-lasting treatment for spondylotic myelopathy of the cervical spine. Use of CTMCs without end caps was associated with statistically significant increased postoperative kyphotic angulation and chronic pain. Despite an increase in focal kyphosis over time, regional cervical sagittal lordotic alignment had increased at the latest follow-up. Further investigation will include the association of chronic neck pain and postoperative kyphosis, and high fusion rates among a veteran population of heavy smokers.

摘要

目的:有关颈椎前路椎体次全切除术后治疗颈椎病和神经根型颈椎病的长期疗效的数据很少。在这项回顾性研究中,报告了 130 例颈椎病或神经根型颈椎病患者行 1 或 2 个节段颈椎前路椎体次全切除术后的长期影像学结果。

方法:在辛辛那提退伍军人事务医疗中心,对 15 年(1993-2008 年)的电子病历(包括临床数据和影像学图像)进行了回顾。所有患者均接受了至少 12 个月(12-156 个月,平均 45±39.3 个月)的影像学随访,神经外科工作人员进行了平均 29.3±39.6 个月(4-156 个月)的临床随访。手术和最后检查时的临床参数包括 Chiles 改良日本矫形协会(mJOA)脊髓病量表。测量包括术前和术后侧位颈椎矢状位排列,手术节段的局部 Cobb 角以及 C2-7 区域排列。统计分析包括学生 t 检验和卡方检验。记录围手术期并发症和颈椎的进一步手术。

结果:mJOA 评分从术前的 11.91±2.4 分提高到术后的 14.9±2.33 分。C2-7 脊柱的平均矢状后凸从术前的-16.2°±9.2°增加到最后随访时的-18.5°±11.9°。最新影像学随访时,焦点 Cobb 角平均有轻微的后凸角 4.1°±2.3°;值得注意的是,7 名(5.4%)患者(均使用圆柱形钛网笼(CTMCs))出现严重的后凸角(+8.4°±2.4°)。术前有脊髓病的患者在随访时显示出临床改善。融合率为 96.2%;5 名影像学显示未融合的患者中有 3 名是吸烟者。术后后凸的患者有明显更多的慢性颈部疼痛(视觉模拟评分>4,持续时间超过 6 个月)和与疼痛相关的就诊次数(p<0.01)。无论融合的节段数如何,使用 CTMCs 的患者术后后凸、慢性颈部疼痛和与疼痛相关的就诊次数更高(p<0.01)。在最近的随访中,尽管在焦点颈椎矢状 Cobb 角中出现了后凸增加,但 C2-7 矢状 Gore 角的后凸增加。有 2 名患者(1.5%)接受了植入移植物和/或内固定物的翻修,有 5 名患者(3.8%)在 1-9 年后因相邻节段病变再次进行了其他手术(平均 4.4±2.7 年)。

结论:我们在退伍军人人群中的长期随访数据支持颈椎前路椎体次全切除术作为治疗颈椎脊髓病的有效、持久的治疗方法。使用无端盖的 CTMC 与术后后凸角度明显增加和慢性疼痛相关。尽管随着时间的推移焦点后凸增加,但在最新随访时颈椎矢状区域的排列已经增加。进一步的研究将包括慢性颈部疼痛和术后后凸的关系,以及重度吸烟者的退伍军人人群中较高的融合率。

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