Intradural lumbar disk herniation.

Intradural lumbar disk herniation is an uncommon occur­ rence in the natural course and clinical spectrum of lumbar disk disease. The reported cases suggest an incidence of 0.13%. This case report presents some of the commonly occurring clinical and radiographic findings in intradural lumbar disk herniation, including those of CT. It also demonstrates the importance of metrizamide-enhanced CT in the evaluation of intradural lesions.