Enlargement of a PICA-involved-type Vertebral Artery Dissecting Aneurysm after Recanalization of an Endovascularly Occluded Vertebral Artery. Case Report

Abstract

We present a case of PICA-involving ruptured vertebral artery dissecting aneurysm (VA-DA) that was initially treated by endovascular proximal coil embolization. One month after the operation, recanalization was observed by angiography. Four years after the first operation, a neuroradiological examination revealed complete occlusion of the right VA. However, the surgical findings of continuous bleeding into the aneurysm was assumed to be occurring from the vasa vasorum. Based on this case, we suggest that careful observation is necessary when a VA-DA aneurysm is treated by endovascular proximal coil embolization, because of the risk of insufficient blockage of the vasa vasorum, which is difficult to detect by neuroradiological examination.