The authors report 2 patients with benign vertebral compression fracture with intravertebral vacuum. Both patients suffered from back pain after minor back trauma and were treated by kyphoplasty. The spine images of one case shows intra-and inter-vertebral vacuum dots since 1weeks after trauma. The other's shows only intravertebral vacuum dots immediately after trauma and then intravertebral vacuum cleft(Kummell's disease) 5 weeks after trauma. The authors speculate that Kummell's disease(delayed posttraumatic vertebral collapse with intravertebral vacuum cleft) was evolved from untreated or unrecognized vertebral compression fracture. Kummell's disease is not a independent disease entity.
