|
FIG 4. Case 1: 41-year-old woman with a meningioma at C1–C2 who underwent embolization the day before surgery.
A, Right vertebral angiogram before embolization shows a C2 branch supplying the intradural tumor (arrow).
B, Selective microcatheter injection of the common trunk of the feeder (large arrow) and the normal branch (small arrow) is performed before embolization.
C, Late arterial phase of selective injection shows that most of the contrast medium in the normal branch is washed out (small arrows) because the wedged microcatheter caused flow reversal in the branch. Note that dense contrast medium remains in the trunk (large arrow) just distal to the tip of the microcatheter.
D, Injection after infusion of PVA particles in the trunk shows almost complete occlusion of the feeder (large arrow) and patency of the normal branch (small arrows).
E, Right vertebral angiogram after embolization with Gelfoam pieces shows complete occlusion of both the feeder (large arrow) and the normal branch (small arrow).
|