From the case: Diagnostic discography

Axial CT at L4 /L...
Axial Myelography
Axial CT at L4 /L5 region showing contrast encircling the extruded disc material, simulating ring enhancement.
Modality: CT (Myelography)

- “ The most common cause of extradural mass in lumbar region is disc material. The morphology of the lesion depends upon whether it is the disc protr...”

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