Figure 1
A T1-weighted cross-sectional magnetic resonance image at the level of lumbar puncture (T2-weighted cross-sectional images were not obtained). The bony spinal canal is congenitally relatively small. The cross-sectional area of our patient's dural sac was 80 mm2. With excess epidural fat of LEL 2 according to Borré (small arrows), the dural sac completely outlines the bundle of nerve roots (greyish appearing, large arrow) leaving no free cerebrospinal fluid space, which would have appeared nearly black. These nerve roots are not completely free to move away when a needle is inserted into the dural sac.