Fig. 4

a FLAIR, Fluid-Attenuated Inversion Recovery, sagittal (2014): Large non-homogenous hyperintense lesion of the right frontal lobe involving demyelination and oedema with mild mass-effect. It is relatively sharply defined to grey matter and confluent with white matter. Glial tumour is undetectable. b FLAIR, Fluid -Attenuated Inversion Recovery, transverse (2014): Diffuse hyperintense lesion of the right frontal lobe - demyelination. It has mild mass-effect. It is well-defined to cortex and to white matter and irregular in shape. c 3D DIR, 3D Double Inversion Recovery, sagittal (2014): Multifocal cortical involvement in the right frontal cortex adjacent to demyelinated lesions, diffuse confluent hyperintensive lesion in cortico-subcortical fronto-polar region