ABSTRACT
The characteristic pathological lesions in ankylosing spondylitis are vertebral body osteoporosis, ankylosis of the apophyseal joints, intervertebral disc calcification, and ligamentous ossification. Calcification of the annulus fibrosis reduces the movement and elasticity of the intervertebral disc, causing this point to be the site of least resistance when the spine is subjected to trauma. The rigid spine may secondarily develop osteoporosis, further increasing the risk of spinal fracture. The ligamentous fragility and multiple fused vertebral segments cause the fractured ankylosing spondylitic spine to resemble a long-bone fracture. In ankylosing spondylitis patient who have sustained minor trauma, a complete radiological study of the entire spine and not just the symptomatic region must be performed for an accurate diagnosis, so that any fracture possible along the spine can be detected and thus prevent any medicolegal problems. The authors report 4 cases of ankylosing spondylitis including 2 cases with severe neurological abnormalities that had occurred after minor trauma.
