Abstract
In case of constitutional disease of bone, spinal deformation may occur in the young days, leading to neuropathy. We reported a case of constitutional disease of bone, suffering from spinal bony ankylosis, and leading to spinal pseudoarthrosis after having the 10th and 11th thoracic vertebrae fractured by compression without apparent history of trauma. The spinal pseudoarthrosis might be attributed to the chronic stress concentration on the area fractured by compression. We applied anterior and posterior fusions using instruments and obtained good union.