Fig. 2. (A and B) Antero-posterior view and lateral view of the right ICA angiography obtained 3 weeks before the endovascular procedures, demonstrating a large aneurysm (22 mm) in the cavernous portion of the right ICA. (C and D) Antero-posterior view of the left ICA angiography and lateral view of the right vertebral artery angiography with compression of the right carotid artery (compression study), demonstrating collateral blood supply from the posterior circulation to the right ICA through the right posterior communicating artery. ICA: internal carotid artery.
