Figure 2.

Angiographical territorial filling defect, suggestive of branching-site occlusion. On post-deployment angiogram during stent retriever thrombectomy, branch-missing sign can be observed (A,B, arrowhead). In patients whose missing branch is vague, angiographical filling defect could be helpful to guess the presence of the missing branch. On lateral view of post-deployment angiogram, corresponding territorial filling defect is seen (asterisk in C). On final angiogram, the missing branch is obviously observed (D). ICA, internal carotid artery; MCA, middle cerebral artery; ACA, anterior cerebral artery.