Fig 4.

Pontine hemorrhage 2 weeks following flow-diverting stent placement for a large left posterior cerebral artery aneurysm in a 52-year-old man. Axial DWI (A) and SWI (B) performed at 2 days post-stent deployment show 2 small foci of restricted diffusion in the right cerebellar hemisphere but no signal disturbance in the brain stem. Sagittally reformatted noncontrast CT scan (C) obtained 2 weeks after stent deployment following a syncopal episode shows a 3-mm pontine hemorrhage (arrow). Axial DWI (D) and SWI (E) performed at 6 months show the susceptibility effect at the site of the prior pontine hemorrhage.