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Case 1. Before treatment, FLAIR was normal and DWI showed a mildly hyperintense left putamen. Perfusion abnormalities (CBF decrease) existed in the superficial MCA territory, which was normal on DWI (PWI-DWI mismatch). MRA showed a left proximal MCA occlusion. After IA thrombolysis, the flow was restored in the left MCA. A deep MCA infarct with petechiae and a small cortical infarct in the left inferior frontal gyrus (not illustrated) were seen on 24-hour DWI follow-up.
