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![Cerebral ischemia at early postoperative period of direct revascularization for moyamoya disease: a case report and literature review](https://image.oaes.cc/7d47dfd9-ad29-4c3d-b714-f053ecca1533/1994.fig.1.png)
Figure 1. Preoperative angiography. Left ICA (A) and right ICA (B) angiography revealed a bilateral moyamoya disease. Vertebral angiography showed stenosis at proximal segment of right PCA and pooly developed left PCA, suggesting posterior circulation involvement (C). The anterior-posterior (B) and coronal (D) view of right ICA showed a watershed between parietal and occipital lobe, where there was lack of moyamoya collaterals from both anterior and posterior circulation (white arrow). ICA: internal carotid artery; PCA: posterior cerebral artery