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07.06.2015 | Original Article | Ausgabe 6/2016

European Spine Journal 6/2016

Compressive myelopathy in severe angular kyphosis: a series of ten patients

Zeitschrift:
European Spine Journal > Ausgabe 6/2016
Autoren:
Zhengfeng Zhang, Honggang Wang, Chao Liu

Abstract

Objective

Compressive myelopathy in severe angular kyphosis is rare and challenging for surgical treatment. The goal of this retrospective study was to report a series of ten patients with compressive myelopathy in severe angular kyphosis and the results of surgical decompression and correction of kyphosis.

Methods

Between 2010 and 2014, 10 patients were surgically treated for severe angular kyphosis with a progressive onset or a sudden onset of paraplegia in investigator group. In these ten patients (seven males and three females), the etiologic diagnosis included eight cases of congenital kyphosis and two of neurofibromatosis; the distribution of spine level was from C5 to T11; the duration from onset until surgery ranged from 1 to 120 months; follow-up ranged from 12 to 26 months (mean 18.5 months); the kyphosis angle of the patients ranged from 50° to 180°. Magnetic resonance imaging demonstrated the spinal cord thinning and compression at apex in most of patients. All patients underwent decompressive surgery by single-stage posterior vertebral column resection or both anterior corpectomy fusion and posterior fixation. Neurological status was evaluated using the ASIA impairment classification and the motor score.

Results

Postoperatively, all patients had different kyphosis correction rate from 24 to 100 %. Nine patients showed neurological improvement; one patient showed no improvement. Among them, one sudden onset ASIA A adolescent paraplegic patient improved to ASIA E within 1 year of follow-up. One ASIA C adolescent paraplegic patients deteriorated neurologically to ASIA A after surgery and improved to ASIA D with 12-month follow-up.

Conclusions

Compressive myelopathy in severe angular congenital kyphosis is usually occurred high incidence rate at apex of upper thoracic spine (T1–T4). The duration from onset of paraplegia until surgery and the severity of paraplegia before surgery are two key factors for neurological prognosis after surgery.

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