Avascular necrosis of a vertebral body, a relatively uncommon entity, is caused 
by malignancy, infection, radiation, systemic steroid treatment, trauma, and the 
like.1 Vertebral osteonecrosis induced by trauma is called Kvmell's disease, 
because it was initially described by Hermann Kvmell of Germany in 1891.2 This 
paper reported a young female with posttraumatic vertebral osteonecrosis and 
analyzed the causes. She was treated by thoracoscopic surgery successfully.