Balloon test occlusion of internal carotid artery: Angiographic findings predictive of results

Figure 2 A 30-year-old patient with left skull base meningioma (Grade A4, M4; circle of Willis Type 3; balloon test occlusion negative). In the right internal carotid artery injection, both the anterior cerebral artery and the middle cerebral artery on the left are well visualized by a cross flow via the anterior communicating artery (A) and the posterior communicating artery (B).