Abstract
Posterior epidural migration of lumbar disc herniation (PEMLDH) is rare. Four new cases of this condition are reported, in addition to the 59 previously documented cases. It has been reported that the incidence of PEMLDH ranges from 0.46 to 3.8 percent of surgically treated lumbar disc herniation. More than 40 per cent of the herniation were observed at L1-2 to L3-4 levels. Although the mechanism is not well known, age-related disc degenerations could play a role as a predisposing factor. MRI is most useful for diagnosis of this condition. The clinical symptoms of PEMLDH are more severe and frequently linked to neural damage of the cauda equina, therefore prompt surgical treatment may be necessary.
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