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Fig 1. A–C, Anteroposterior view of the left common carotid artery with occlusion of the left M1 (A) with pial collaterals. After passing the clot, anteroposterior view of microcatheter injection (B), showing contrast extravasation in the subarachnoid space. (C) After microcatheter perforation, left internal carotid artery injection, showing absence of contrast extravasation.
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