Presentation
Recurrent bilateral sciatica. History of lumbar spine surgery.
Patient Data
Age: 65 years
Gender: Female
From the case:
Adhesive arachnoiditis - empty thecal sac sign
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Info
The prior operation was obviously performed at the L5/S1 level. Here and caudally, the thecal sac appears devoid of its cauda roots.
Case Discussion
This is considered as a sign of (prior) adhesive arachnoiditis with adhesions developing between nerve roots and the parietal arachnoid.
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