Internal carotid artery aneurysm visualized during successful endovasculartreatment of carotid embolism

We herein present a case of an internal carotid artery embolism associated with a hidden internal carotid artery aneurysm. The aneurysm was visualized during successful endovascular treatment of the carotid embolism. In retro spect, the aneurysm was at risk of rupture during the procedure. In the end ovascular treatment of cerebral embolism, the possibility that aneurysms ar e hidden by emboli must be borne in mind. Care should be taken not to injur e unidentified arterial walls while advancing a catheter blindly.