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Axial diffusion-weighted MRI and T2-weighted MRI scans. On the day of presentation, axial diffusion-weighted MRI (left) showed a tiny focus of restricted diffusion in the left dorsal pons (arrow). Also, there was a corresponding subtle focus of signal hyperintensity noted on the T2-weighted fluid-attenuated inversion recovery sequence, which suggests a very tiny 4 mm infarct.
