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Figure 1: (a) MRI brain FLAIR (fluid-attenuated inversion recovery) image demonstrating left frontal stroke and “ivy-sign” in the left parietal region due to lepta-meningeal collaterals. (b) CT perfusion imaging showing reduced cerebral blood flow in the left frontoparietal region in the same patient

Figure 1: (a) MRI brain FLAIR (fluid-attenuated inversion recovery) image demonstrating left frontal stroke and “ivy-sign” in the left parietal region due to lepta-meningeal collaterals. (b) CT perfusion imaging showing reduced cerebral blood flow in the left frontoparietal region in the same patient