Abstract
Lumbar disk herniation associated with posterior vertebral apophyseal avulsion is unusual and was first considered to occur only in adolescents. Now it is clearly demonstrated that posterior vertebral apophyseal avulsion may also occur in adults in which the ring apophysis is completely ossified and joined to the vertebral body.We described two adults cases with low back pain and leg pain. In both cases traumatic episodes were not conspicuous. Radiographs and CT scan demonstrated characteristic bony fragments at the vertebra posteriorly bulging into the spinal canal. One case was operated on by laminotomy, discectomy and removal of bony fragments. The other case was first operated on by laminotomy and foraminotomy, but his symptoms persisted necessitating a second operation of discectomy and removal of bony fragments.
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