![]() ![]() ![]() Histopathological examination showing bone necrosis.Ischemic bone necrosis theory: Vertebral collapse and cleft formation occur as a consequence of a vascular insult,.The mechanism of IVC has not been will determined and it is difficult to say which is the initiative event of cleft formation, The lesion is mainly located in thoraco-lumbar junction (Th11-L1) and usually associated with osteoporosis or osteopenia and sometimes with corticosteroid therapy, It may be found incidentally in asymptomatic patients. IVC is usually found in elderly patients with back pain weeks to months after history of trauma. We can say that an IVC sign represents a collection of gas,įluid or both within the cleft of the collapsed vertebral body. Many studies showed that signal void due to gas within the cleft is gradually replaced by fluid in prolonged supine position. MR imaging often shows fluid-like signal intensity within the cleft, This sign is also called “intravertebral vacuum phenomenon” or “intravertebral vacuum cleft sign”.Īlthough this sign was believed to represent a gaseous collection within vertebra, This sign is characterized by gaseous lucency within vertebral body seen on radiographs or CT scan.Īs its counterpart within the joint space which is known as “vacuum phenomenon”, Which was thought to represent an ischemic vertebral collapse. Intravertebral cleft sign is a radiological finding first described by Maldague et al in 1978, ![]()
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