Fig. 1
From: Laminectomy by craniotome for huge spinal extradural arachnoid cyst: a case report
a. Sagittal thoracolumbar region T1-weighted showing a spinal extradural arachnoid cyst from T9-L4. b. Coronal lumbar T1-weighted MRI showing compression of the spinal cord by a posteriorly placed arachnoid cyst. c. Axial lumbar T2-weighted MRI