Post contrast T1W images reveal smooth and diffuse pachymeningeal enhancement. The dural venous sinuses appear distended. The pituitary gland also appears prominent. There is sagging of the tentorium cerebelli and the splenium of the corpus callosum.
MRI of spine shows epidural CSF collection with partial collapse of the dorsal spinal dura. The epidural venous flow voids appear prominent, particularly posterior to the lumbar vertebral bodies.