FIGURE 2. Catheter angiogram for the further evaluation of vascular injury. The catheter angiogram was taken the day after the computed tomography angiogram. The pseudoaneurysm (arrowhead) was grown in size. Arterial dissection (arrow) was also found at the entrance of petrous bone and around the anterior part of cavernous sinus (A, B). This vascular injury might be caused by the immobilization of the artery to the petrous bone and the dural ring. The right middle cerebral artery (MCA) was clearly visualized on the right internal carotid artery (ICA) angiogram (C). The pseudoaneurysm size grew markedly in the intraoperative angiogram during the endovascular coiling on the cavernous ICA distal to the pseudoaneurysm (D, E). Intraoperative angiogram after the ICA trapping and the revascularization showed that the distal branches of the right MCA was visualized from the superficial temporal artery (F).