<prompt> Radial Band sign on MRI Brain is seen in?Multiple sclerosisTuberous SclerosisMultisystem Atrophy type CProgressive Supranuclear palsy  <response>: Radial bands are specific for the diagnosis of tuberous sclerosis and are usually best seen on T2 FLAIR as linear regions of high signal extending form the ventricle to the coex. Radial band sign is indicative of abnormal migration of dysplastic stem cells in patients with tuberous sclerosis complex. MRI axial FLAIR image showing radial bands black veical down arrow, sub-ependymal nodule thin black arrow and coical tuber white arrow in a patient with TS. Dawson Fingers-Multiple Sclerosis Hot cross Bun sign-multisystem atrophy type c Humming birdpenguin signmickey mouse sign -progressive supranuclear palsy 