FIG 3.

Female patient with a myleographically proved spinal CSF leak (not shown). Upper row, MR imaging performed before spinal surgery demonstrates typical findings of intracranial hypotension—SIH score = 8: pachymeningeal enhancement (2 points), engorgement of venous sinus (2 points), effacement of the suprasellar cistern (≤4.0 mm, 2 points), no subdural fluid collection (0 points), effacement of the prepontine cistern (≤5.0 mm, 1 point), and mamillopontine distance (≤6.5 mm, 1 point). Lower row, MR imaging performed after surgery demonstrates almost complete resolution of all findings: SIH score 2, due to residual dural enhancement. Note also the decrease in pituitary size (arrow).