Inj ury mechanism and imaging features of ankylosing spondylitis with spinal fracture in patients at middle-late stage / 实用放射学杂志

ABSTRACT

Objective To explore injury mechanism and imaging manifestations of ankylosing spondylitis (AS)with spinal frac-ture so as to reduce missed diagnosis and misdiagnosis.Methods Imaging and clinical data of 1 5 patients with AS in combination with spinal fracture as well as 37 patients with common spinal fracture were reviewed retrospectively and analyzed subsequently.Results Among the patients with AS,1 1 had explicit trauma history,9 had three column fracture on images,7 had spinal canal compression or spinal cord inj ury,and 6 had fracture lines across the intervertebral disk.Among the patients with common spinal fracture,the corresponding number were 36,4,5 and 0 in sequence.There were significant differences between AS fracture group and common fracture group in trauma history (χ2=4.565,P<0.05),three column fracture (χ2=11.274,P<0.05),spinal canal compression or spinal cord injury (χ2=4.873,P<0.05)and fracture across the intervertebral disk (χ2=13.041,P<0.05).Conclusion There are obvious differences between AS with spinal fracture and common spinal fracture in injury mechanism.X-ray,CT and MRI have different advantages in the diagnosis of AS with spinal fracture,and choosing appropriate imaging techniques may reduce missed diagnosis and misdiagnosis.