Spinal Cord Injury and Spinal Fracture in Patients with Ankylosing Spondylitis
Abstract Background Spinal cord injury (SCI) and spinal fracture are major complications in patients with ankylosing spondylitis (AS) who sustain spinal trauma. The purpose of this study is to investigate the incidence, predictors, and sequelae of spinal trauma in patients with AS. Methods This study evaluated our AS patients who had spinal traumas between January 1, 2006, and June 30, 2016 and a comparison of those patients with SCI alone, fracture alone and both SCI and spinal fracture. Results 105 patients were enrolled. Of these patients, 89.5% had spinal fractures, and 57.1% had SCI. Among the patients with spinal fractures, 52.1% had SCI. The existence of bamboo spine was significantly more frequent in the fracture group (78.7% vs. 36.4%; P = 0.006) than in the non-fracture group. The SCI patients had more subluxation or dislocation (48.3% vs. 8.9%; P < 0.001), and more cases of spinal epidural hematoma (SEH) (21.7% vs. 2.2%; P = 0.003) than the non-SCI patients. The rate of delayed diagnosis for spinal fracture was 31.4%, where 1/3 of these patients developed delayed SCI. Among the incomplete SCI patients, 58.3% had neurological improvement after treatment (P = 0.004). Conclusions The patients with existing bamboo spine at X-ray had a higher spinal fracture rate. Spinal fractures involving the C3-C7 region, subluxation or dislocation, spinal fracture severity, and a SEH were found to be predictive of SCI. SCI in AS patients resulted in a high mortality and complication rates.