Department of Neurosurgery, IRCCS Humanitas Research Hospital -, via Manzoni 56, 20089 Rozzano, Milan, Italy.
Department of Biomedical Sciences, Humanitas University, via Rita Levi Montalcini 4, 20090 Pieve Emanuele, Milan, Italy.
Acta Neurochir (Wien). 2024 Aug 22;166(1):347. doi: 10.1007/s00701-024-06242-4.
BACKGROUND: Non-contiguous two-level Anterior Cervical Discectomy and Fusion (ACDF) may be a viable option for patients with degenerative cervical myelopathy and imaging-evident spine and radicular compression at two non-contiguous cervical levels. The risk of hastening degeneration and triggering Adjacent Segment Disease at the spine levels located between the fused levels is a putative adverse event, which was assessed in a few studies. The aim of this study is to investigate the clinical outcomes of patients undergoing non-contiguous two levels ACDF and to assess biomechanical modifications at non-fused segments. METHOD: We retrospectively reviewed all patients with noncontiguous two-level spine and radicular compression, who underwent simultaneous noncontiguous two-level ACDF at our center. We analyzed clinical and radiological outcomes and investigated the rate of adjacent segment disease. Radiographic parameters were calculated on pre- and postoperative images. RESULTS: Thirty-two patients underwent simultaneous noncontiguous two-level ACDF for cervical myelo-radiculopathy between 2015 and 2021 and were followed up for a mean period of 43.3 months. For all patients, the mJOA score significantly improved from 14.57 ± 2.3 to 16.5 ± 2.1 (p<0.01) and the NDI score significantly decreased from 21.45 ± 4.3 to 12.8 ± 2.3 (p<0.01) postoperatively. Cervical lordosis increased after surgery (from 9.65° ±9.47 to 15.12° ± 6.09); intermediate disc height decreased (5.68 mm ± 0.57 to 5.27 mm ±0.98); the ROMs of intermediate (from 12.45 ± 2.33 to 14.77 ± 1.98), cranial (from 14.63 ± 1.59 to 15.71 ± 1.02), and caudal (from 11.58 ± 2.32 to 13.33 ± 2.67) segments slightly increased. During follow-up assessment, in one patient the myelopathy worsened due to spine compression at the intermediate level. CONCLUSIONS: Simultaneous and non-contiguous two-level ACDF is a safe and effective procedure. The occurrence of postoperative adjacent and intermediate segment disease is rare.
背景:对于患有退行性颈椎脊髓病且影像学显示两个不连续颈椎水平存在脊柱和神经根受压的患者,非连续两级前路颈椎间盘切除术和融合术(ACDF)可能是一种可行的选择。在融合水平之间的脊柱水平加速退变和引发相邻节段疾病的风险是一种假定的不良事件,已有少数研究对此进行了评估。本研究旨在探讨接受非连续两级 ACDF 的患者的临床结果,并评估非融合节段的生物力学改变。
方法:我们回顾性分析了 2015 年至 2021 年在我们中心接受同时非连续两级 ACDF 治疗的非连续两级脊柱和神经根受压的所有患者。我们分析了临床和影像学结果,并调查了相邻节段疾病的发生率。在术前和术后图像上计算影像学参数。
结果:32 例患者因颈髓神经根病而行同时非连续两级 ACDF,平均随访时间为 43.3 个月。所有患者的 mJOA 评分均显著改善(从 14.57±2.3 提高至 16.5±2.1,p<0.01),NDI 评分也显著降低(从 21.45±4.3 降低至 12.8±2.3,p<0.01)。术后颈椎前凸增加(从 9.65°±9.47°增加至 15.12°±6.09°);中间椎间盘高度降低(从 5.68mm±0.57mm 降低至 5.27mm±0.98mm);中间节段(从 12.45±2.33°增加至 14.77±1.98°)、颅侧节段(从 14.63±1.59°增加至 15.71±1.02°)和尾侧节段(从 11.58±2.32°增加至 13.33±2.67°)的活动度略有增加。在随访评估中,有 1 例患者由于中间水平的脊柱压迫导致脊髓病恶化。
结论:同时非连续两级 ACDF 是一种安全有效的方法。术后相邻和中间节段疾病的发生较为罕见。
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