[The intravertebral vacuum phenomenon. A rare finding in vertebral compressions].

In the context of osteoporotic vertebral compression fractures the formation of an intravertebral vacuum phenomenon is a very rare but characteristic feature. Ischaemic osteonecrosis has been discussed as a probable cause of the disease. In most cases the vertebrae Th12, L1 or L3 are affected. Just over 60 case reports have as yet been published in international literature. Our two case reports fit well into the existing picture of the intravertebral vacuum phenomenon.