Perforator Infarction after Placement of a Pipeline Flow-Diverting Stent for an Unruptured A1 Aneurysm

A 68-year-old woman with an incidentally discovered aneurysm. A and B, 3D and 2D angiograms show a dumbbell-shaped aneurysm on the left A1 segment. C, Position of 2 telescopically placed Pipeline stents. Note stasis of contrast material inside the aneurysm. D and E, Diffusion-weighted MR images demonstrate basal ganglia infarctions.