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Figure 1 :(a) Showed the exposure of right CCA (white arrow) and right SA (black arrow). (b) AA angiography showed right SA was not visualized. (c) the right SA was visualized through the right VA. (d) left VA angiography showed the right SA was visualized through the right VA, the BA and posterior cerebral artery (PCA) were almost not visualized, indicating hypoperfusion in posterior circulation. (e) right ICA angiography showed the right SA was visualized through the right VA, but the right MCA and anterior cerebral artery (ACA) territories were not stained very well. (f) AA angiography showed the normal anatomy of AA and the arteries above itself. (g) left SA was not visualized in the early phase when AA angiography was performed after embolization, but in the late phase (h) it was visualized through the same way as mentioned in C, D and E. Right VA angiography (i) showed that left SA was visualized through the same mechanism. Surface view (j) and transparency view (k) of the ICA showed stenosis at the origination of ICA, in which atherosclerotic plaque was found and later was confirmed by pathohistological section (l) HE staining, 40

Figure 1 :(a) Showed the exposure of right CCA (white arrow) and right SA (black arrow). (b) AA angiography showed right SA was not visualized. (c) the right SA was visualized through the right VA. (d) left VA angiography showed the right SA was visualized through the right VA, the BA and posterior cerebral artery (PCA) were almost not visualized, indicating hypoperfusion in posterior circulation. (e) right ICA angiography showed the right SA was visualized through the right VA, but the right MCA and anterior cerebral artery (ACA) territories were not stained very well. (f) AA angiography showed the normal anatomy of AA and the arteries
above itself. (g) left SA was not visualized in the early phase when AA angiography was performed after embolization, but in the late phase (h) it was visualized through the same way as mentioned in C, D and E. Right VA angiography (i) showed that left SA was visualized through the same mechanism. Surface view (j) and transparency view (k) of the ICA showed stenosis at the origination of ICA, in which atherosclerotic plaque was found and later was confirmed by pathohistological section (l) HE staining, 40