 This exam is degraded by motion artifact. There is a focus of decreased diffusion and T2 hyperintensity centered within the right hemi-pons. There are scattered additional foci of T2 hyperintensity throughout the supratentorial white matter. There is a fluid signal intensity well-defined lesion within the pineal cistern that measures up to 18 mm. There is no midline shift or herniation. The vertebrobasilar flow voids are relatively inconspicuous. The skull, paranasal sinuses, and scalp soft tissues are unremarkable. There is a left lens implant.
1. Acute right brainstem infarct without evidence of hemorrhagic transformation, but the vertebrobasilar flow voids are relatively inconspicuous. Dedicated vascular imaging is recommended.2. Mild chronic small vessel ischemic disease. 3. Pineal cyst. 