7 T T2∗ weighted imaging in PML. A 7 T T2∗ weighted (T2∗w) image with a spatial resolution of (0.2 × 0.2) mm is shown. Please note the difference in lesion morphology between periventricular oval MS lesions that are centered on a small venous vessel (arrows) and confluent PML lesions (circle) that also involve U-fibers and subcortical areas.