Figure 1

Patient 1: (A) Sagittal and (B) transverse T2-weighted MRI with contrast of the lumbosacral spine shows a rim enhancing cystic lesion (white arrow) centrally located at the L3/4 level compressing onto the cauda equina (grey arrow). Patient 2: (C) Transverse and (D) sagittal T2-weighted MRI image shows Grade I spondylolisthesis and spinal stenosis at the L4/5 level being compressed by a huge cystic structure (white arrow) with a thick cystic wall onto the cauda equina (grey arrow).