Fig. 2.
a T2-weighted axial magnetic resonance (MR) image shows a cystic mass (arrow) originating from the disc and compressing the traversing right nerve root. b Epiduroscopic image shows the laser electrode inserted (white arrow) into the cyst (black arrow). c Post-operative T2-weighted axial MR image shows the decompressed cyst (arrow) and visualization of the L5 traversing root