Present features of intracranial hypotension:
- probably small subdural effusion bilaterally frontopolar and perimesencephalic on precontrast sequences (or could be just dural thickening)
- diffuse dural enhancement (there is no leptomeningeal enhancement that would indicate meningitis)
- rounding and engorgement of venous sinuses
- convex contour and hyperemia of hypophysis
- small forward angling of brainstem
- mild herniation of cerebellar tonsils through foramen magnum