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Intrathecal disc extrusion

Case contributed by Assoc Prof Frank Gaillard


Leg weakness.

Patient Data

Age: 60 years
Gender: Female

Focal high T2 signal lesion with faint surrounding enhancement is seen at the T12/L1 level. It appears to communicate with the nucleus pulposus via an annular defect but also appears intrathecal, compressing the conus. On axial T2 a subdural CSF collection can be seen below the lesion. 


Findings are most compatible with T12-L1 intradural disc extrusion.

Case Discussion

The patient went on to have a laminectomy. Displacement of the theca confirmed a ventral defect. The theca was opened and intrathecal disc extrusion confirmed and resected. The ventral defect was closed. 

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Case information

rID: 68847
Published: 17th Jun 2019
Last edited: 22nd Sep 2019
System: Spine
Inclusion in quiz mode: Included

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