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  • Title: A comparative effectiveness study of patient-rated and radiographic outcome after 2 types of decompression with fusion for spondylotic myelopathy: anterior cervical discectomy versus corpectomy.
    Author: Burkhardt JK, Mannion AF, Marbacher S, Dolp PA, Fekete TF, Jeszenszky D, Porchet F.
    Journal: Neurosurg Focus; 2013 Jul; 35(1):E4. PubMed ID: 23815249.
    Abstract:
    OBJECT: Both anterior cervical discectomy with fusion (ACDF) and anterior cervical corpectomy with fusion (ACCF) are used to treat cervical spondylotic myelopathy; however, there is currently no evidence for the superiority of one over the other in terms of patient-rated outcomes. This comparative effectiveness study compared the patient-rated and radiographic outcomes of 2-level ACDF versus 1-level ACCF. METHODS: This single-center study was nested within the EuroSpine Spine Tango data acquisition system. Inclusion criteria were the following: consecutive patients presenting with signs of cervical spondylotic myelopathy who underwent 2-level ACDF or 1-level ACCF between 2004 and 2011. Before and 12 months after surgery, patients completed the multidimensional Core Outcome Measures Index (COMI) and also rated global treatment outcome and satisfaction with care on 5-point Likert scales. Cervical lordosis, segmental height, and fusion rate were assessed radiographically before and immediately after surgery and at the last follow-up (20.4 ± 13.7 months, mean ± SD). RESULTS: In total, 118 consecutive patients (80 in the ACDF group and 38 in the ACCF group) were included. Age, sex, comorbidity, baseline symptoms, baseline radiographic data, operation duration, and complication rates did not differ significantly between the 2 groups. Blood loss was significantly (p < 0.04) lower in the ACDF group. Postoperative mean segmental height was significantly (p = 0.0006) greater for ACDF (42.0 ± 4.2 mm, mean ± SD) than for ACCF (39.0 ± 4.0 mm), and global average lordosis improved to a significantly (p = 0.003) greater extent in ACDF (by 1.6° ± 4.1°) than in ACCF (by -1.0° ± 4.0°). Fusion rates for ACDF were 97.5% and for ACCF were 94.7% (p = 0.59). The 12-month patient-rated outcomes did not differ significantly between ACDF and ACCF: 82.4% and 68.6% had a good global outcome (operation helped/helped a lot) (p = 0.10), 86.5% and 82.9% were satisfied/very satisfied with care (p = 0.62), and the reduction in the multidimensional COMI was 2.8 ± 2.7 and 2.2 ± 3 points (p = 0.30), respectively. The postoperative increase in lordosis angle showed low but significant correlations with the improvement in arm pain (r = 0.25, p = 0.014), highest pain (r = 0.25, p = 0.013), and function (r = 0.24, p = 0.016). CONCLUSIONS: Both ACDF and ACCF are safe and effective in the treatment of cervical spondylotic myelopathy, indicated by similarly good patient-rated outcomes 1 year after surgery. This precludes any conclusions regarding the superiority of one technique over the other, although it should be noted that ACDF resulted in less blood loss and greater improvements in cervical lordosis and segmental height than ACCF. Patients with improved lordosis angle had a better clinical outcome.
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