Notice a focal anterior displacement of the spinal cord at the level T6-T7. The sagittal images show a focal anterior displacement of the spinal cord.
The axial images show an asymmetry in this displacement being more pronounced on the right side. On the right there is a herniation of spinal cord through a dural defect presenting as an extradural mass.
There is a focal enlargement of the subarachnoid space. Notice a normal flow void behind the spinal cord which makes an arachnoid cyst less probable as a cause for the herniation.
